THE ABDOMINAL AORTA

(AFTER HENLE.) AI, the common ilise artery; J, the external illac; H7, the Internal iliac; SM, the midale sacra i; PIR, the inferior phrenic arteries; LB, one of the lumbar arterles; C, the celiac; MBS, the superior mesenteric; MÆI, the inferior mesenteric: SR, the capeular; R, the renal; SPJ, the Internal epermatic; Æ, the internal hæmorrholdal. [L, 177.]—Inferior esophageal arteries. Lat., arteriæ cesophaee infer i ores. Fr., artères œsophagiennes inférieures, Ger., unere Speiser6hrepulsadern. The oesophageal branches of the coro- a. of the stomach. wine.]—Inferior palatine a. Lat., arteria pal at in a inferior, … artére palatine inférieure. Ger., aufsteigende Gau mensch lag a der. Sp., arteria pal at in a inferior. A branch of the facial a. which ascends between the rangle Ses and Svig amar nreus muscles and then between the internal pterygoid muscle and the wall of the pharynx to the base of the skull. it is distributed to the muscles in its neighborhood, the tonsil. the Eustachian tube, and the soft palate. [L, 142.]—Inferior palpebral a. Lat., arteria palpebral is inferior. artére palpébrale inférieure. Ger., Arterie des unteren Angenlids, Sp., arteria palpebral inferior. A branch of the ophthalmic a. which arises near the front of the orbit and, lying below the internal tarsal ligament, gives off small branches to the conjunctiva, the lacrymal sac, and the caruncle, and, after pa ing outward between the orbicularis muscle and the tarsus, forms an arterial arch on the free margin of the lower lid with a branch of the lacrymal a. {L, 142.] —Inferior pancreatico-duodenal a, Lat., arteria pancreaticoduodenalis inferior, Fr., artére pancréatico-duodénale inférieure. Ger., untere -Bauchspeicheldrüsenzwëlffingerpulsader. A branch of the superior mesenteric a. distributed to the concavity of the duodenum and anastomosing with the superior pancreatico-duodenal a, [L, 17.]—Inferlor perforating arteries of the hand. Branches of the dorsal intero eous arteries of the hand which unite them with the palmar digital arteries. [L, 179.)—Inferior perforating a. See Third perforating a. of the thigh.—Inferlor pharyngeal a. See Ascending pharyngeal a.—Inferior phrenl¢ arteries. Lat., arteriæ phrenicæ mferiores. Fr., artères phréniques inférieures. Ger., untere Zwerchfellpulsadern. Sp., arterias diafragmaticas infer i ores. A term applied to branches of the cæliac a., or of the abdominal aorta, distributed to the inferior surface of the diaphragm and anastomosing with the superior phrenic, the musculo-phrenic, and the arteries of the lower intercostal spaces. {L, 7.]-Inferior pro fund a a. of the arm. Lat., arteria pro- Gunes brachii inferior. Fr., artére coll atérale supérieure du bras. jer., untere tiefe Arm puls a der. A branch of the brachial a. which arises about the middle of the arm and runs downward in company with the ulnar nerve to the back part of the inner condyle of the os brachii, where it anastomoses with the posterior ulnar recurrent, a. and anastomotic arteries of the arm. It supplies branches to the inner head of the triceps muscle and to the parts it traverses. [L, 142.] —Inferior scapular a. See Subscapular a.—Inferlor suprarenal arteries. Lat., arteriæ supra ren a les infer i ores, Fr., artéres surrénales inférieures. Ger., untere Nebennierenpulsadern. One or two small branches of the renal a. distributed to the suprarenal capsules. [L, 142.]—Inferior thoracic a. Fr., artère thoracique inférieure. See External thoracic a.—Inferior thyreoid a. Lat., arteria thyreoidea inferior. Fr., artère thyréoïdienne inférieure. Ger., untere Schilddriisenarterie. A branch of the thyreoid axis which runs directly upward in front of the vertebral a., a short distance beyond which it bends inward and downward behind the large cervical ve els and the sympathetic nerve, and then curves in the opposite direction and terminates in branches to the thyreoid gland. It gives off the ascending cervical and crico-thyreoid arteries and numerous branches to the trachea, the esophagus, and the cervical muscles, [L, 142.|—Inferlor ureteric a. A branch of the superior vésical or uterine artery, distributed to the lower part of the ureter and the adjacent part of the bladder. {L, 179.]—Inferior vertebral arteries. The aortic arches of the embryo. [L, 171.J— Inferior vesical a. Lat., arteria vesical is inferior. Fr., arlére vésicale inférieure. Ger., untere Blaseupulsader. Rieaci ie vesical inferior. A branch, usually of the anterior division of the internal iliac a., which runs directly toward the base of the bladder. It is distributed to the lower part of the bladder, the prostate gland, and the vesiculæ semina les. [L, 142.]—Inferior volar perforant arteries.’ See Inferior perforating arteries of the hand.—Infraorbital a. Lat., arteria infra-orbital is. Fr., artére sous-orbitaire. Ger., untere Augenhählenpulsader. Sp., arteria sub orb i far i a. A branch of the internal carotid a., which pa es out upon the face through the infra-orbital foramen in company with the superior maxil ere: It gives off the posterior dental a. and branches to the orbital muscles, the lacrymal sac, and the structures around the inner angle of the eye. ite 142.|—Infra scapular a. See Subscapular a.—Inner dorsal a. of the thumb. Lat., arteria feito radial is dorsal is, Fr., artére radio-dorsale du pouce. Ger., Speichenriickenpulsader des Daumens. A branch of the radial a. arising opposite the base of the metacarpal bone of the thumb, and distributed to the radial side of the dorsal aspect of the thumb. [L, 142.]—Innominate a. Lat., arteria in no min at a (seu anonyma), Fr., artére anonyme. Ger., ungenannte Pulsader. Sp., arteria inominada. 1. An a. arising from the upper surface of the transverse portion of the arch of the aorta. It ascends cpa toward the right sterno-clavicular articulation, opposite which it divides into the right subclavian and common carotid arteries. It lies in front of the trachea and pleura and behind the sternum, from which it is separated by the sterno-hyoid and sterno-thyreoid muscles, the remains of the thymus gland, and the right innominate vein. It occasionally gives off the deep thyreoid a. [L, 142] 2. See Clavicular a.—Intercostal arteries. See Anterior intercostal arteries, Aortic intercostal arteries, and Superior intercostal a.—Interlobular arterles of the kidney. Lat., arteriæ iuterlobulares. Branches of the arterial arches formed at the bases of the pyramids, which run outward through the cortical substance, and are finally distributed to the Malpighian corpuscles and to a capillary network around the uriniferous tubules. [L, 142, 172.]— Internal and anterior optic a. Fr., artére ont e interne et antérieure, A branch of the posterior communicating a. of the brain which ramifies on the anterior portion of the third ventricle, on the walls of the infundibulum, and is distributed to the optic thalamus. {H. Duret, l. c. (L).|—Internal auditory a, Lat., arteria duditiva intern a. Fr., artére auditive interne. Ger., innere Arterie des Ohres. Sp., arteria auditiva intern a, A branch either of one of the transverse branches of the basilar or of the superior cerebellar a., which accompanies the auditory nerve into the inner ear, and is distributed to the labyrinth. [L, 142.] —Internal calcaneal arteries. Fr., artéres calcanéennes internes. A term applied to branches of the posterior tibial and peroneal arteries Uistributed to_the parts on the inner side of the heel and sole of the foot. [L, 142, 172.|—Internal carotid a. Lat., arteria carotis intern a. Fr., artère carotide interne. Ger., innere Kopfschlagader. Sp., arteria carôtid a intern a. One of the two terminal branches of the common carotid a. given off at the level of the upper border of the thyreoid cartilage. It runs directly upward to the carotid canal in the temporal bone, which it traverses to enter the cranium by the foramen lacerum anticum; it then runs in the carotid groove of the sphenoid bone, at the end of which it bends upward on the inner side of the anterior clinoid proce to the inner side of the fi ure of Sylvius, O, no; O3, not; O%, whole; Th, thin; Th?, the; U, like 00 in too; U*, blue; U%, lull; U*, full; U*, urn; US, like ü (German). where it divides into the anterior and middle cerebral arteries. In the neck it lies at first behind the external carotid a., covered by the platvern a myoides muscle and fascia; higher up it pa es beneath the digastric and stylo-hyoid muscles, lying to the inner side of the external carotid a.; above these muscles it lies under the parotid gland, the styloid RNa of the temporal bone, and the stylo-pharyngeus muscle. Within the head it lies upon the floor of the cavernous sinus, which it perforates on the inner side of the anterior clinoid proce . From the point at which it perforates the sinus to its termination it lies between the second and third cranial nerves, The internal jugular vein and the pneumogastric nerve are included with it in a prolongation of the carotid sheath during its pa age through the neck. In addition to its terminal branches, it gives off the ophthalmic a. and numerous small branches to its vicinity. [L, 142.] See ARTÈRE encéphalo-palatine.—Internal circuinflex a. of the thigh. t. arteria circumflex a femoris intern a. Fr., artère circonflexe interne de la cui e. Ger., innere Kranz puls a der des Oberschenkels. Sp., arteria circonfleja intern a, An a, which arises from the inner and posterior part of the deep femoral a. just below its origin, and eee backward between the as and pectinseus muscles toward the le er trochanter of the Femur, near which it divides into branches distributed to the hi joint and the muscles in that region. [L, 142.]—Internal col- Tatorall elbow a. See Ulnar a.—Internal hæmorrholdal a. Lat., arteria hemorrhoidal is intern a, Fr., artère hémorrhoïdale interne. Ger., innere Mastdarmpulsader. See Superior hæmorrhoidal a.—Internal iliac a, Lat., arteria iliac a intern a. Fr., ‘THE INTERNAL ILIAC ARTERY. (AFTER HENLE.) 7, the common iliac; 7, the tnternal Ine; J the external Mine; S, the hi superior Joteal vases i, the middle ıe ilio-lumbar; O, the obturator; SZ, & lateral sacral; G, the ‘i A, the ischladic; D, the a. of the vas deferens; V7, the inferior vesical'; ZI. hemorrhoidal, artère iliaque interne. Ger.. innere Hüftpulsader. Sp., arteria iliac a intern a, A branch of the common iliac a. which extends from its bifurcation to the upper border of the great sacro-sciatic notch, where it divides into two branches, the anterior and posterior. At its origin it lies near the border of the psoas muscle, but lower down it rests against the sacrum and the lumbo-sacral cord, and is in its whole course covered by the peritoneum. From its anterior division it gives off the superior vesical, inferior vesical (vaginal in the female), middle hemorrhoidal, obturator, internal pudic, sciatic, and in the female the uterine, arteries. From the posterior division are given off the ilio-lumbar and lateral sacral and gluteal arteries. [L, 142.|—Internal laryngeal a. Lat., arteria laryngea intern a. Ger., innere Kehlkopfarterie. See Superior laryngeal a. —Internal malleolar a. Lat., arteria malteolaris intern a, Fr.. artère maltéolaire interne. Ger., innere Knôchelpulsader. Sp., arteria maleolar intern a. A branch of the anterior tibial a. which runs inward beneath the tendon of the tibial is antic us muscle to the inner malleolus, in the vicinity of which it is distributed. [L, 142.)—Internal mammary a. Lat., arteria mammaria intern a. Fr., artére mammaire interne. Ger., innere Brust puls a der. Sp., arteria mammaria intern a. À branch of the subclavian a. arising opposite the thyreoid axis. It runs downward and forward to the posterior surface of the cartilage of the first rib, from which point it descends vertically behind the costal cartilages, about an inch from the border of the sternum, to the interval between the sixth and seventh cartilages, where it divides into Îts terminal branches, the musculo-phrenic and superior epigastric arteries. In the upper part of its course it lies upon the pleura, but at its lower end it is separated from it by the triangular is stern i muscle. At its origin it is covered by the subclavian vein and is cro ed from within outward by the phrenic nerve. Besides its terminal branches, it gives off the anterior interc« arteries. [L, 142.]—Internal maxillary a. Lat., arteria max it laris intern a. Fr., artère maxilla ire interne, Ger., innere Kieferschlagader. Sp., arteria maxi- ‘THE INTERNAL MAXILLARY ARTERY je ITS BRANCHES. (AFTER HENLE, MI, the internal maxillary; CE, the external carotid; TPS, the superficial temporal; APR, the deep auricuiar; 7, the anterior tympanic; MM, the middle meningeal; ÀI, the inferior dental; MH, the mylo-byoid; MT, the mental; 7'PRI, the deep anterior temporal; PT, the pterygoid Uranch; M, the masteteric; B, the buctinator; ASP, the posterior branch of the superior alveolar; 70, the infra-orbital’; AS., the anterior branch of the euperior alveolar; VD, the vidian; SP, the spheno-palatine; EP, the ptervgo-palatine; PO, the posterior nasal; WP, the naso-palatine; TPK3, the deep posterior temporal; i, the temporal muscle; 2, the external pterygoid muscle. lar intern a. One of the terminal branches of the external carotid a., which runs horizontally forward between the jaw and the internal lateral ligament of the Pern nprO max Ry, articulation, and then pa es obliquely forward and upward on either the inner or outer surface of the extern a} pterygoid muscle to the spheno-maxilk fo a, where it breaks up into a number of branches. It is divided into the maxillary portion, or that part between the jaw and the internal lateral ligament; the pterygoid, or that portion lying upon the pterygoid muscle; and the spheno-maxillary, or that portion just outside of and within the spheno-maxillary fo a. From the first part are given off the deep auricular, anterior tympanic middle and small meningeal. and inferior dental arteries; ‘rom the second the anterior and posterior temporal, buccal, and ma eteric arteries, and branches to the pterygoid muscles; and from the third the a? dental, infra-orbital, superior palatine, vidian, pterygo-palatine, and spheno-palatine arteries. [L, 142.]— Internal obturator a. Lat., arteria obturator i a intern a. to artère obturatrice interne, Ger., innere Hiiftbeinpulsader, A branch of the obturator a. given off just external to the pelvis, which curves around the inner side of the obturator foramen, furnishes branches to the Cae? muscles, and anastomoses with the external obturator and internal circumflex arteries. [L, 172.]— Internal ophthalmic a. Fr., artère ophthalmique interne. A branch of the common carotid, in birds, distributed to the ma eter muscle, the maxillary articulation, the lower eyelid, and the eye. tt 158,|—Internal palpebral arteries. Lat., arteriæ palpebra les infer i ores. The palpebral branches of the ophthalmic a. {L, 175.] —Internal plantar a. Lat., arteria plantar is intern a. Fr., artère plant a ire interne. Ger., innere Fu soh len puls a der. ‘Sp., arteria plantar intern a. One of the terminal branches of the posterior tibial a., which runs outward in the groove between the abductor hallucis and flexor brevis muscles to the head of the first metatarsal bone, where it terminates by joining the plantar digital a, on the tibial side of the great toe. It furnishes branches to the structures through which it pa es. (L, 142.]—Internal posterior optic a. See Posterior internal optic a.—Internal pndic a. Lat., arteria pudenda intern a. Fr.,artére honteuse interne. Ger., innere Schampulsader. Sp., arteria pudenda intern a, The terminal branch of the anterior division of the internal iliac a., distributed to the perineum and the external organs of generation. It-arises in front of the pyriform is muscle, leaves the pelvis by the lower part of the great sacro-sciatic foramen, then curves forward over the spine of the ischium, enters the posterior portion of the perineal space by the le er sacro-sciatic foramen, and runs along the outer wall of the ischio-rectal fo a about an inch above the tuberosity of the ischium. Running forward, it pierces the base of the triangular ligament, pa es forward inits folds to about the apex of the pubic arch, and terminates under the crus penis in the arteries of the bulb and of the penis. It gives off the external hemorrhoidal and superficial and transverse perineal arteries and the arteries of the bulb of the urethra and of the penis. {L, 31, 142.]—Internal scapular a. See Subscapular a.—Internal spermatic a. Lat., arteria spermatic a intern a. Fr., artère sperm at i que interne. A branch of the abdominal aorta which arises a little below the renal a., and runs down upon the psoas muscle to reach the internal abdominal ring, where it enters the inguinal canal. It pa es down the canal with the other constituents of the spermatic cord and is distributed to the testicle. L, 142.j—Internal tarsal a. Fr., artère tarsienne interne. A ranch of the dorsal a. of the foot running forward and inward to the level of the bases of the metatarsal bones, and, anastomosing with the internal plantar, continued on to the great toe. [L, 35.]— Internal thoracic a. Lat., arteria thoracic a intern a, oy A Ttère thoracique interne. See Internal mammary a—Inter peduncular arteries. Fr., artères interpédonculaires. Branches of the posterior cerebral a. distributed to the terior perforated space and the lower portion of the peduncles, [H. Duret, 7, c. (L).J— ntestinalarteries. Lat., arteric in test in a les. Ger., Dünndarmpulsadern. A term applied to the small branches of the mesenteric arteries distributed to the in test it [L, 175.]—Ischia die a. Lat., arteria ischiadic a. Fr., artère tachiatioue, 1. See Inferior gluteal a. 2, A branch, in some quadrupeds, of the lateral sacral a. which pa es under the upper portion of the vast us long us muscle and is distributed to the ischio-tibial muscles.—Ischio-clit or i an a. See ARTERIA clitoridis—Laerymal a. Lat., arteria lacrimal is. Fr., artére lachrymale. Ger., Thränenschlagader. It., arteria lagrimale. Sp., arteria lagrimal. A branch of the ophthalmic a. which arises close to the optic foramen and runs along the upper border of the external rectus muscle to the lacrymal gland, to which it is primey distributed. It also gives off branches which pierce the malar bone and others distributed to the une eyelid and the conjunctiva. [L, 142.)— Large anastomotic a. of the arm. See Anastomotic a. o, the arm.—Large a. of the thumb. Lat., arteria princeps pollicis. Fr., grande artère du pouce. Ger., gro e Daumenpulsader. A branch of the radial a. which pa es down between the metacarpal bone of the thumb and the muscles covering it to the space between the heads of the flexor brevis pollicis muscle, where it divides into the palmar collateral arteries. [L, 142.|—Large collateral a. of the arm. See Pro fund a, a. of the arm.—Large communicating radial a. See Pro fund a radial a.—Large lateral nasal a. See Spheno-palatine a.—Laryngeal arteries. See Superior laryngeal a. and Crico-thyreoid a.—Lateral arteries of the sacrum. See Lateral sacral arteries—Lateral coccygeal a. The continuation of the lateral sacral a. of some quadrupeds, which runs along on each side of the sacrum. [L, 13.] —Lateral nasal a. Lat., urteria nasal is lateral is. Fr., artère de Vaile du, nez. Ger., seitliche Nasenarterie. A branch of the facial a. which runs inward to the side of the nose, over which it ramifles, sending branches to the ala and dorsum. [L, 142.)— Lateral sacral arteries. Lat., arteriæ sacrales later a les. Fr., artères sacrées latérales. Ger., seitliche He i lig be in puls a dern. Branches of the internal iliac a. which run down on the anterior surface of the sacrum. They are distributed to the sacrum and its neighborhood. In man sometimes, in quadrupeds as a rule, they are united into one trunk. [L, 13, 142,|—Lateral spinal arteries. Lat., arteriæ spinales later a les, Ger., vordere Rückenmarkspulsadern. Branches of the vertebral arteries which enter the spinal canal through the intervertebral foramina. „ 172.|—Left bronehlal arteries. Lat., arteriæ bronchia les sinistre. Fr, artères bronchia les gauches. Ger., linke Luftrohrenpulsadern, Branches from the left side of the thoracic aorta. distributed to the posterior suctace of Mle cormdanondiiy betweqavend diusuanr tHe Iaı ‘The lower of the two is sometimes termed the inferior bronchial a, [L, 142.]—Left cardiac a. See Left coronury a. of the heart.— Left colic a. Lat., arteria colic a sinistræ. Fr., artère colique gauche. Ger., linke Grimmdarmpulsader. A branch of the inferior mesenteric a. which runs acro the left kidney behind the per it onæum to the descending colon, where it divides into an as- Cole and a descending portion, which run upward and downward along the colon. This term is sometimes applied to the inferior mesenteric a. itself. [L, 142.]—Left coronary a. of the heart. Lat., arteria coronaria. cord is sinistra. Fr., artère coronaire gauche du cœur. Ger., linke Kranz puls a der des Herzens. An a. arising from the left posterior sinus of Valsalva, which runs behind and to the left side of the pulmonary a. and divides into two branches. one of which runs in the groove between the left auricle and ventricle, and the other along the line of the interventricular septum, and is distributed to the ti ue of the heart. [L, 142.]—Left gastric a., Left gastro-epiploie a. Lat., arteria gastro-epiploic a sinistra. Fr., artère gastro-epiploïque gauche. Ger., linke Magennetzpulsader. Sp., arteria gastro-epiploic a, izquierda. A branch of the splenic a. which runs along the greater curvature of the stomach from left to right, supplying branches to the stomach and the omentum on the left side and anastomosing with the right gastro-epiploic a. [L, 31, 142.]—Left gastro-hepatic a. See Coronary a. of the stomach.— Left gastro-omental a. See Left gastro-cptr loic a.—Left hepatic a. Lat., arteria hepatica sinistra, Fr., artère hépatique jauche. Ger.,linke Leberpulsader. An a. arising at a right angle ‘rom the hepatic a., which enters the liver at the left end of the front a les moyenne et interne. transverse fi ure. It also furnishes branches to the Spigelian lobe. [L 142.]—Lenticulo-optic arteries. Basal branches of the middle cerebral, distributed to the sterior portion of the internal capsule and the anterior part of the optic thalamus. (L, 189.]—Lenticulo-striate arteries. Branches of the middle cerebral a. distributed to the lenticular and caudate nuclei. dis 189.]—Le er pro fund a a. of the arm. See Inferior pro fund a 'a. 0 the arm. —Lingual a. Lat., arteria lingual is. Fr., artère linguale. Ger. Zungenpulsader. Sp., arteria lingual, A branch of the external carotid a, which is given off between the superior thyreoid and facial arteries, usually opposite the great cornu of the hyoid bone. It ascends for a short distance and then curves downward, form in, a loop cro ed by the yese e a nerve, after which it runs Mereatil the digastric and stylo-hyoid muscles and pa es forward along the ae border of the great cornu of the hyo d to the anterior border of the hyo-glo us muscle, whence it ascends to the lower surface of the tongue, along which it is continued as the ranine a. It gives off the hyoid, sublingual, and ranine arteries, and the dorsal a. of the tongue. [L, 142.|—Long ciliary arteries. Lat., arteriæ ciliares longæ. Fr., artères ciliaires longues. Ger., vordere Blendungspulsadern. Sp., arterias ciliares largas, Two branches of the posterior ciliary arteries, one on each side, which are distributed to the ciliary muscle and the iris. [L, 142.|—Long thoracic a. Lat., arteria thoracic a longa. Fr., artère thoracique longue. See External mammary a.—Lumbar arteries. Lat., arteriæ lumbales. Ger., Len den puls a dern. Branches, usually five in number, of the abdominal aorta, which pa backward to the interval between the transverse proce es of the vertebrae and divide into abdominal and dorsal branches. The abdominal branches are distributed to the lateral wail of the abdomen and the dorsal to the muscles and integument of the back, also sending branches through the intervertebral foramina to the spinal canal. [L, 142.|—Malar arteries. Branches of the lacrymal a. which pierce the malar bone to reach the temporal fo a, to which they are distributed. [b; 172.]—Malleolar arteries. See External and Internal malleor a—Mammary arteries. See External and Internal mammary a.—Ma etéric a. Lat., arteria ma eteric a. Fr., artère ma étérine. Ger., Kaummuskelpulsader. A branch of the pterygoid portion of the internal maxillary a. which pa es outward throngh the sigmoid notch of the inferior maxilla to the deep surface of the ma eter muscle, to which it is distributed. [L, 142.]— Mastoid a. Lat., arteria mas to idea, Fr., artére mas toïdienne, 1, A branch of the occipital a. which enters the skull through the mastoid ‘foramen and is distributed to the dura mater and the diploe. 2. A branch of the posterior auricular a. running over the insertion of the sterno-cleido-mastoid muscle to the occipital is muscle and the overlying integument, and anastomosing with the occipital a. [L, 142.|—Maxillo-museular a. A branch, in some quad is, of the external carotid a. distributed to the internal ptery- ‘old and ma eter muscles, [L, 13.)—Median a. Lat., arteria melia. Fr., artére du nerf médian. Sp., arteria del nervio medio. A branch of the anterior intero eous a. of the arm which accompanies the median nerve and is distributed to its substance and to the flexor sublimis digitorum muscle. fe. 142.)|—Median sacral a. See Middle sacral a.—Med i cerebellar a, [Wilder]: See Anterior inferior cerebellar a—Med i cerebral a. [Wilder]. See Middle cerebral a. —Medio-colic a. See Middle colic a—Medullary arteries. Fr., artères médullaires. 1. See Nutrient arteries, 2. The arteries of the medullary substance of the brain. [L.]—Meningeal arteries. See Anterior meningeal arteries, Posterior meningeal a., Inferior meningeal arteries, Middle meningeal a., and Small meningeal a.—Mental a. Lat., arteria mental is. Fr., artère mentale. Ger., Kinnpulsader. The terminal branch of the inferior dental a,, which pa es out on to the face through the mental foramen and is distributed to the side of the chin and face. [L, 142.]—Mesenteric arteries. See Great, Small. Superior, Inferior, and Middle mesenteric a.—Meso-lobar a. Lat., arteria me so-lobar is, See Anterior cerebral a.—Metacarpal a. Lat., arteria rete Pea The first dorsal intero eous a. of the hand. It arises from the radial a. beneath the extensor tendons of the thumb, frequently in common with the posterior radio-carpal a. and descends upon the second dorsal intero eous muscle to the level of the ee ira a eal articulation. where it divides into the dorsal digital arteries to the adjacent sides of the index and middle fingers. It communicates with the deep palmar arch. In the pl., the dorsal and palmar intero eous arteries. (, 7, 142, 172.|—Metatarsal a. Lat., arteria me tatar sea. Fr., artère métatarsienne. Ger., erste Mittelfu rückenpulsader. ‘A branch of the dorsal a. of the foot, which arises near the bases of the metatarsal bones and runs outward beneath the extensor brevis muscle to anastomose with branches of the tarsal and external plantar arteries, forming the plantar arch. In the pl., the dorsal and plantar intero eous arteries. [L, 7, 142, 172.|—Meta~ tar so-pedal a. One of the two terminal branches of the pedal a, of the horse and some other solipeds, which runs down the side of the metatarsus and divides into the collateral arteries of the digits. [L, 13.J Middle and internal frontal arteries. Fr., artéres Branches of the anterior cerebral ‘a. distributed to the convolution of the corpus callosum. the corpus callosum itself, the first and second frontal convolutions, and the upper part of the ascending frontal convolution. {L, 189.]|—Mlddle a. of the corpora quadrigemina. Fr., artère moyenne des tubercules quadrijumeaux. A branch of the poster lor cerebral a. which terminates in fine ramifications in the space between the corpora quadrigemina, [H. Duret, J. c. (L).|—Mlddle artieular a. of the knee. Lat., arteria articular is genu media. Fr., artére articulaire moyenne du genou. Ger., mittlere Kniegelenkpulsader. Sp., arteria articular media. A branch of the popliteal a. which arises opposite the flexure of the knee joint, jerces the posterior ligament, and is distributed to the crucial eamante and the structures within the joint. [L, 142.)—Middle calcaneal arteries. Lat., arteriæ calcaneæ media. Several small branches of the posterior tibial a. distributed to the O, no; 03, not; 0%, whole; Th, thin; Th?, the; U, like 00 in too; U3, blue; U?, lull; U*, full; U®, urn; US, like à (German). 56 outer and back surface of the os calcls. [L, 31.]—Middle cerebral a. Lat., arteria cerebral is media. Fr., artére cérébrale moyenne. Ger,, mittlere Genin usaney Sp., arteria cerebral media. One of the two terminal branches of the internal carotid a. which runs obliquely outward and_upward in the fi ure of Sylvlus to the surface of the island of Rell, where it divides into branches distributed to the pia mater covering the outer surface of the cerebrum. It also gives off the anterior chorioid and lenticulonuclear arteries. [L, 31, 142.—Middle coccygeal a. A branch of one of the sacral arteries of some of the lower animals, which runs down on the inferior surface of the caudal vertebrae, between the two depre or muscles of the tail, to its extremity. [L, 13.]—Middle colic a. Lat., arteria culica media, Fr., artére colique moyenne, Ger., mittlere Dickdarmpulsader. A branch of the superior mesenteric a. which runs forward between the layers of the transverse me so colon toward the transverse colon, where it divides into two branches, one of which anastomoses with the right colic a. and the other with the left colic and a number of small branches distributed to the coats of the colon. [L, 142.|—Middle external pudic a. An occasional branch of the superficial epigastric a. distributed to the parts supplied by the inferior and superior external udic arteries. [L, 179.|—Middle hemorrhoidal a. Lat., arteria heemorrhoidalis media. Fr., artére hémorrhoïdale moyenne. Ger., mittlere Mastdarmpulsader. Sp., arteria he morro i dal media, An a. arising most commonly from the internal iliac, but occasionally from the inferior vesical or the internal pudic, which is distributed to the lower part of the rectum and anastomoses with the superior and inferior hemorrhoidal and inferior vesical arteries. fe 142,|—Middle meningeal a. Lat., arteria meningeal is media. T. artére méningée moyenne. Ger., mittlere Hirnhautpulsader. A branch of the internal maxillary a. which enters the cranium by the foramen spinosum and is distributed to the dura mater from the frontal bone in front to the ooeittal behind and as high as the vertex, [L, 142.)—Middle mesenterle a. Lat., arteria mesenteric a media. An occasional branch of the common iliac a., furnishing branches to the transverse and descending colon. [L, 142.] —Middle nasal a. Lat., arteria nasal is media. Fr., artère nasale moyenne. See Anterior nasal a.—Middle parietal a. Fr., artére par iétale moyenne. A branch of the middle cerebral a. which ascends in the fi ure of Rolando and is distributed to its convolutions and often to the anterior portion of the first parietal convolution. [H. Duret, l c. (L).|—Mlddle perforating a. of the thigh. See Second perforating a. of the thigh.—Middle sacral a. Lat., arteria sacral is media. Fr., artère sacrée moyenne. Ger., mittlere He i lig be in puls a der. A single a., arising fro in the abdominal aorta just above its bifurcation into the common iliac arteries, which runs downward upon the last lumbar vertebra and along the middle of the sacrum to the front of the coccyx, where it anastomoses with branches of the lateral sacral arteriés and is continued onward through the median aponeurosis of the levator ani muscles to the coccygeal gland. It sends small branches to the sacrum and the parts between it and the rectum and to the rectum itself. [L, 142.|—Middle suprarenal a. See Capsular a.—Middle temporal a. Lat., arteria temporal is media. ir, artère temporale moyenne. Ger., mittlere Schlifenbeinpulsader, Sp., arteria temporal media. A branch of the superficial temporal a. which arises close above the zygoma, ascends in a groove upon the squamous portion of the temporal bone, and is distributed to the temporal fo a. [L, 142.]—Middle thyreoid a. Fr., artère thyréoidienne moyenne. An occasional branch of the common carotid a. distributed to the thyreoid body. [L, 35.|—Middle ureteric arteries. Small branches of the aorta, or of the common iliac or internal Gaia a., distributed to the middle portion of the ureter. [L, 1/9.|—Middie vesieal (or vesicular) arteries. Lat., arteriæ vesica les med iæ. The posterior branches of the superior vesical. [C; L, 142.]—-Musenlo-phrenie a. Lat., arteria muscupe nent Fr., artère musculo-phrénique.- Ger., Muskelzwerchfellpulsader. The outer of the two terminal branches of the internal ena a., which runs downward and outward behind the cartilages of the loathe be It gives off branches to the diaphragm, the lower intercostal spaces, and the abdominal muscles. [L, 142.] —Mylo-hyoid a. Lat., arteria mylo-hyoidea. Fr., artère mylohyoïdienne. Ger.. Kieferzungenbeinpulsader. A branch of the inferior dental a, which runs downward in the mylo-hyoid groove and is distributed to the mylo-hyoid muscle. [L, 12]—Nasal a. Lat., arteria nasal is, Fr., arte nasale. Ger., Nasenarterie. Sp., arteria nasal. A term applied to the anterior nasal and to the spheno-palatine arteries, but more properly to the latter. [L.] See also Lateral nasal a.—Naso-palatine a. Lat., arteria naso-pal at in a, Fr.,artére naso-palatine, A branch of the sphenopalatine a, which runs down in the groove in the vomer and connects with the descending palatine through the incisor foramen. [L 142.|—Navel arteries. See Umbilicul arteries.—Nutrient a. of the fibula. Lat., arteria nutriens fibulæ. A small branch of the peroneal a, which supplies the fibula. tr, 172.|—Nutrient a. of the humerns. See Nutrient a. of the os brachii —Nutrient a. of the ilium. Lat., arteria nutriens ilii. A branch of the gluteal a., which enters the lower part of the ilium. trient a. of the os brachii. Lat., arteria nutriens o is brachii. Fr., artère nourricière de l’humérus. Ger., Ernährungspulsader des Oberarmes. A branch of the brachial a. which arises about the middle of the arm and enters the os brachii near the insertion of the coraco-brachial is muscle. {L, 172.]—Nutrient a. of the radius. Lat., arteria nutriens radii. Fr., artère nourriciére du radius. Ger., Erndhrungspulsader der Speiche. A branch of the anterior intero eous a, of the forearm, which supplies the radius, [L, 172.] —Nutrient a. of the tibia. Lat., arteria nutriens tibice. Fr., artère nourriciére du tibia. Ger., Ernährungspulsader des Schienbeins. A branch of the posterior tibial a. which descends upon the external and posterior surface of the tibia, which it enters through the nutrient foramen, It gives off branches to the adjacent muscles in its course. [L, 7.]—Nutrient a. of the ulna. Lat., arteria nutriens ulnæ. Fr., artère nourricière du cubitus. Ger., 4 7.]—N Ernihrungspulsader der Ellenbogenrähre. A branch of the anterior intero eous a. of the forearm supplying the ulna, fh, 7.1— Nutrient branchial arterles. Fr., arléres nourriciéres des branchies. Branches of the efferent arterioles of the branchial eapillary network of the Branch i at a, distributed to the substance of the gills. [L, 158.|—Obturator a. Lat., arteria obturator i a. Fr., artére obturatrice. Ger., Hüftbeinlochpulsader. A branch of the internal iliac a., most commonly of its anterior division, resting upon the obturator portion of the pelvic fascia, which pees out of the pelvis through the upper part of the thyreoid foramen, and upon the surface of the obturator membrane divides into an external and internal branch. The internal branch curves around the inner margin of the foramen and is distributed to the obturator, pectinaeus, practic, and adductor muscles, and anastomoses with the internal circumflex a. The external branch pa es around the outer margin of the foramen to the space between the gemellus inferior and quadratus femoris muscles, where it anastomoses with the sciatic a. It supplies the obturator muscles and sends a branch to the hip joint. This ve el occasionally arises from the internal Gaal a., in which case it may curve along the free margin of Gimbernat’s ligament and be wounded in the operation for femoral hernia. [L, 142, 172.)—Occlpital a. Lat., arteria occipital is. Fr.,artere occipitale. Ger., Hinterhauptspulsader. Sp., arteria occipital. 1. A branch of the external carotid a. which arises from its posterior surface near the lower border of the digastric muscle. It runs upward to the interval between the transverse proce of the atlas and the mastoid proce of the temporal bone, whence it runs horizontally to the occipital bone, upon which it turns npeer to divide near the occiput into branches. It gives off the mastoid a., the arteria princeps cervicis, and branches to the occiput and the muscles of the neck, [L, 7, 142, 172.] 2. A branch of the posterior cerebral a. distributed to the occipital convolutions and adjacent parts. [II. Duret, J. c. (L),|—Occipito-dorsal a. Fr., artére occipito-dorsale. A branch of the cervico-pulmonary a., distributed to the dorsal pectoral and the lateral cranial regions in the toad. (L, 158.—Occipito-meningeal a. A branch of the vertebral a, distributed to the dura mater. [L, 115.]—Oceipito-museular a. One of the terminal branches of the occipital a. of many of the lower animals, distributed to the occiput. [L, 13.]—Csophageal arteries. Lat., arteriæ æsophageæ. Fr.,artéres esophagiennes. Ger., Speiserührenpulsadern. See Aortic and Inferior esophageal arteries.—Om.: phalo-mesenteric arteries. Lat., artériæ omphalo-me sente rice. Fr., artéres omphalo-mésentériques. Ger.. Nabelgekräspulsadern. Sp., arterias omfalo-mesentéricas, The larger of the branches into which the primitive aortæ of the embryo divide, subsequently developed into the umbilical arteries (the others becoming the iliacs). [A. Thomson (A, 5).]—Ophthalmic a. Lat., arteria FONE PBMS = PBMI