area

(a’re-ah) [1,.. A limited space or plane sur face. a. acus’tic a. Same as (rigonunme acustict. ali sphenoid a., the surface of the great wing of the sphenoid bone. a. amniot’‘ica, the transparent part of the human embryo. anteroparietal a., the part of the outer surface of the parietal bone in front of the parictal eminence. aortic a., the area on the chest over the inner end of the second costal cartilage. a ociation a@'8, areas in the cerebral cortex whose function it is to correlate the impre ions received and _ start motor impulses in harmony with them. auditory &@., an auditory center. Betz cell am. See psychomotor a. Broca’s @., an area of gray matter between the middle olfactory root and the peduncle of the callosum: it is the area for speech. a. cel’si. Same as alopecia arcatz. Cohnheim’'s a’s, dark areas outlined by bright matter, seen on cro -section of a muscle-fiber. cord @., that part of the cerebral cortex where lesions will produce degeneration of the spinal cord. a. cribro’- ga, the macula cribrosa. a. of critical definition, that part of an optic image within which the detail is clear. crural &., a space at the base of the brain between the chiasm and the pons. dangerous a., the ciliary region of the eye. so called because when injured the gravest results may follow. embryonic a., the area germinativa. excitable a., the motor area in the cerebral cortex. excitomotor a., that area of the cerebral cortex which incites voluntary motion. Flechsig’s a's, three areas, anterior, lateral, and posterior, on each half of the medulla oblong at a, marked out by the fibers of the vagus and hy poglo al nerves. frontal a., the convex surface of the frontal bone. frontoparietal a., the frontal lobe of the cerebrum with the ascending parietal convolution. genital a’s, areas on the inferior turbinal and upper part of the nasal septum which become engorged during menstruation. germinal a., the round place on one side of the vitelline membrane where the development of the embryo begins. glove-a., an area of anesthesia of the fingers, hand, and wrist in certain cases of multiple neuritis. hyaline a’s, limited areas of hyaline substance surrounding the cell-nests in elastic cartilage. hysterogenic a’s. See hysterogenic points, under point. Kie elbach’s a., an area on the anterior part of the nasal septum above the intermaxillary bone. a's of Langer hans. Sce islands of Langer hans, under island. Lannier- Hacker man a., the region of the lower pharynx and upper esophagus, where diverticula most frequently develop. a. martegia’ni, a slightly enlarged space at the optic disk, marking the beginning of the hyaloid canal. mid frontal a., the median part of the frontal area. mitral a., the area on the chest over the apex of the heart. motor a., the ascending frontal and ascending parietal convolutions where the nerve-centers for motion are thought to be situated. occipital a. 1. The area of the brain below the occipital bone. 2. The outer surface of the occipital bone above the superior curved line. olfactory a., the cerebral area, including the olfactory bulb, tract, and trigone, and the anterior portion of the callosal convolution and the uncus. a. opa’ca, the outer opaque part of the germinal area. parietal a., that portion of the brain below the parietal bone on each side. a. parolfacto’ria [brocs#]. Same as Broca's a. 8ἃ. pellu’cid a, the central clear part of the germinal area. a. placenta’lis, that part of the ectoderm of the ovum which is connected with the wall of the uterus. pos— teroparietal a., that part of the outer surface of the parietal bone that lies behind the parietal eminence. pre central a. See psychomotor a. projection a@’s, Flechsig’s name for the areas of the cerebral cortex which are concerned in the sensory and motor functions of the brain, being connected by projection fibers with the underlying parts of the central nervous system. pi - motor a., the area of the cerebral cortex which is concerned with the integration and the efferent transmi ion of the motor expre ion of the results of sensorial stimulation. It is situated just in front of the central fi ure of Rolando. It corresponds with the pre central area of Campbell and is also known as the Bets cell area. pulmonary a., an area on the chest at the second left intercostal space where sounds formed at the pulmonary orifice of the right ventricle are heard best. rolandic a., the excitomotor region of the brain. sensation a., sense ἃ., the area of distribution of a particular sensory nerve. sensorial a., the general surface of the cerebrum, especially that part which lies between the interparietal, parietal, occipital, and callosomarginal fi ure. septal a., the mesial surface of either half of the septum lucidum. silent a., an area of the brain surface injury of which produces no motor or sensory impre ions: now called a ociation a. Spencer’s a., an area on the cortex of the frontal lobe of the brain just outside of the olfactory tract and anterior to the point where it joins the temporosphenoid lobe. Faradic stimulation of this area influences respiratory movements. squamosotemporal a., the outer surface of the squamous bone. subum- Dilical a., a patch of superficial tenderne on the abdominal surface. superofrontal a., the upper part of the frontal area. temporal a., a patch above the temporal fo a, reaching to the outer canthus of the eye. tricuspid a., the area of the chest-wall over the lower portion of the body of the sternum, where the sounds formed at the tricuspid valve are best heard. trigger a., an area, stimulation of which may cause physiologic or thologic changes in another area. a. Vasculo’sa, that part of the area opaca where the blood ve els are first seen. vertical a., an area of tenderne exactly over the vertex. visual a., the angular gyrus and occipital lobe. visuopsychic @., the area of the cerebral cortex concerned in the interpretation of visual sensations. visuosensory a., the area of the cerebral cortex concerned in the reception of visual sensations. &. vitelli‘na, the yoke area in mesoblastic eggs beyond the area vasculosa. Wernicke’s a., a cerebral area composed of supra marginal and angular convolutions and portions of the first and second temporal convolutions.