Ec-Statica. See Apoplexia.

Cerebri compressio, and concussio. Compres sion of the brain: (from con, and premo, to .press together; and con, and quatio, to shake together ).

This often happens from external injuries, and generally attended with giddiness, dimness of sight, coma, loss of voluntary motion, vomiting, an apoplectic ster-tor in breathing, convulsive tremors in different muscles, a dilated state of the pupil of the eye, even when exposed to a clear light; paralysis of different parts, especially of the side of the body opposite to that part of the head which has been injured; involuntary evacuation of the urine and faeces; an oppressed, and, in many cases, an irregular, pulse; and when the violence done to the head has been considerable, it is commonly attended with a discharge of blood from the nose, eyes, and ears. Some of the milder of these symptoms, such as vertigo, stupefaction, and a temporary loss of sensibility, are frequently induced by slight blows on the head; and as they often appear to be more the consequence of a shock, or concussion given to the substance of the brain, than of compression induced upon it, so they soon commonly disappear, either by the effects of rest alone, or some other gentle means. (See Concussio.) But when any of the other symptoms take place, such as convulsive tremors, dilatation of the pupils, involuntary passage of the urine and feces, and especially when much blood is discharged from the mouth, nose, eyes, and ears, it is almost certain that much violence has been done to the brain, and that compression in some part is induced. In fine, a compression of the brain may be brought on by whatever contributes to diminish the cavity of the cranium, or increase its contents in any considerable degree: hence fractures, attended with depression of any part of its bones, forcible introduction of any extraneous body through both tables of the skull, the effusion of blood, serum, pus, or any other matter, the thickening of the bones of the head produced by lues venerea, collection of water in the ventricles, or other parts of the brain, may occasion this disease. For the cure of which see Concussio; Fractura Cranii; Depressio, Extrava-satio, Hydrocephalus; also Bell's Surgery, vol. iii. p. 132, &c

Cerebri basis. See Palatum.

Ce.'rebri galea. See Cranium.