ZOSTER

(Lat.), n. m. Zo2st(zost)'u6r(ar). Gen., -er'os (-er'is). Gr., fwoTijp ^from <owvvai, to gird). Fr., z., zone, sangle, ceinturon, ceinture, feu persique (ou sacre). Ger., Rose, Giirtel, Giirtelflechte, Feuergiirtel. Shingles, cruels; an acute vesicular eruption, usually painful, characterized by the development of groups of herpetic (see HERPES [2d def.]) vesicles corresponding in situation to the cutaneous distribution of a nerve. The term arises from the fact that in a common form of the disease the eruption apparently tends to encircle the body like a girdle, though practically it hardly ever occupies more than one lateral half. [G, 16.] Z. aigu (Fr.). See Z."L. atypic us gangraenosus et hysteric us. See Z. gangrcenosus hysteric us. Z. auricular is. A rare form of z. developed only in the structures of the ear, which attacks the parts covered by true skin and also extends to the drumhead and cavity of the middle ear. [F.] Z. brachial is. Z. of the arm and forearm, corresponding to the cutaneous distribution of the internal, middle, and external cutaneous, the median, and the ulnar nerves. [G.] Z. capillitii et fron tails. An awkward expre ion (to which z. capillitii et front is would be preferable) for z. of the scalp and the upper portion of the face, occasionally involving the conjunctiva, cornea, and iris, corresponding to the distribution of the first branch of the fifth nerve. [G.] Z. cerebral is. Z. of cerebral origin: characterized by"its extensive distribution, sometimes occupying the whole or the greater part of one side of the body. [G.] Z. cervico-subclavicular is. Z. which begins on the neck, near the edge of the hair, and descends along the side of the neck to the shoulder, thence spreading forward over the skin between the clavicle and the nipple and over a part of the neck above the clavicle. [L, 57 (a, 50).] Z. chronique (Fr.). See Z. redivivus. Z. collar!*. See Z. occipito-collar is.Z. dor so-abdominal is. Z. of the back and abdomen, corresponding to the cutaneous distribution of the eighth, ninth, tenth, eleventh, and twelfth dorsal nerves. [G.] Z. dor so-pectoral is. Z. of the back and pectoral region, corresponding to the cutaneous distribution of the third, fourth, fifth, sixth, and seventh dorsal nerves. Z. facial is, Z. faciei. Facial z., which may appear upon the face, the temporal region, the external ear, and the mucous membrane of the nose, mouth, and throat; corresponding to the superficial distribution of the trigeminus nerve. [G.] Z. femoral is. See Z. lumbofemoralis.Z. gangraenosus. Z. in which certain of the vesicles or vesicular groups become gangrenous. Usually the gangrene begins after the vesicle has formed, and can be seen in its progre , through the unbroken epidermis. At other times it occurs primarily, affecting either a single vesicle or an entire group. In the latter case the border of the gangrenous patch is seen to preserve this irregular and indented outline of a vesicular group. [G.] Z. gangraenosus hysteric us. Of Kaposi, a form observed in patients with hysterical symptoms among which it is supposed to belong. It differs from ordinary z. in the distribution of the efflorescences, which do not follow the course of a particular nerve; also in the fact that in most of the cases described the eruption was symmetrical and in the occurrence of gangrene in certain vesicular groups of the eruption. [" Arch, fur Derm. u. Syph.," Sept., 1889, p. 561 (G).] Z. hysteric us. An eruption resembling z. due to hysteria (cf. Z. gangrcenosus hysteric us). [G.] Z. lumbo-femoral is. Z. corresponding to the cutaneous distribution of the second, third, and fourth lumbar, the external anterior cutaneous, the gen i to crural, and the crural nerves. It may appear upon the nates, the front and back of the thigh, and sometimes the calf of the leg. Z. lumbo-inguinal is. Z. of the back and groin, corresponding to the cutaneous distribution of the twelfth intercostal and the first lumbar nerves, together with their anastomoses. [G.] Z. nuchse, Z. occipito-collar is. Z. extending from the region of the second and third vertebrae around the neck to the median line of the throat and to the chin, corresponding to the cutaneous distribution of the fourth cervical nerve. [G.] Z. ophthalmic us. A disease of nervous origin, usually ushered in by more or le severe pain and tenderne in the brow or head, followed by redne and swelling of the skin and the appearance of numerous small vesicles, usually arranged in oval groups. The eruption only extends in the course of the ophthalmic division of the fifth nerve, and is therefore confined to the forehead, the anterior part of the scalp, the eyelids, and the side of the nose. It may affect only certain branches of the ophthalmic nerve. The individual vesicles become confluent, and their contents dry up into scabs which afterward drop off, leaving deep and characteristic scars. The eyeball does not suffer, unle the oculo-nasal branch is involved, when small corneal ulcers may occur or iritis may develop. The temperature of the affected parts is decidedly increased, but the sensibility is diminA, ape; A2, at; A", ah; A4, all; Ch, chin; Ch2, loch (Scottish); [s. 750]