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A chitinous structure above the nervous cord in the thorax of certain Crustacea.

Producing epilepsy or epileptoid convulsions; -- applied to areas of the body or of the nervous system, stimulation of which produces convulsions.

which they are constituted, of responding to the action of stimulants; irritability; as, nervous excitability.

Exciting motion; -- said of that portion of the nervous system concerned in reflex action, by which impressions are transmitted to a nerve center and then reflected back so as to produce muscular contraction without sensation or volition.

d a ready faculty, indeed, of escaping from any topic that agitated his too sensitive and nervous temperament. Hawthorne.

es of sensation distributed over the body, especially in its surface; the sense of touch; nervous sensibility to external objects. Why was the sight To such a tender ball as the eye confined, . . . And not, as feeling, through all parts diffused Milton.

A general nervous restlessness, manifested by incessant changes of position; dysphoria. Dunglison.

Esp., two longitudinal bands of white nervous tissue beneath the lateral ventricles of the brain.

licated fracture (Surg.), a fracture of the bone combined with the lesion of some artery, nervous trunk, or joint. -- Compound fracture (Surg.), a fracture in which there is an open wound from the surface down to the fracture. -- Simple fracture (Surg.), a fracture in which the bone only is ruptured. It does not comm…

s by fermentation or agitation; spume; foam; esp., a spume of saliva caused by disease or nervous excitement.

Furnished with ganglia; as, the gangliated cords of the sympathetic nervous system.

A mass or knot of nervous matter, including nerve cells, usually forming an enlargement in the course of a nerve.

om the neuroglia or connective tissue of the brain, spinal cord, or other portions of the nervous system.

or of sensations which have no corresponding external cause, arising from disorder or the nervous system, as in delirium tremens; delusion. Hallucinations are always evidence of cerebral derangement and are common phenomena of insanity. W. A. Hammond.

The anterior or superior part of an animal, containing the brain, or chief ganglia of the nervous system, the mouth, and in the higher animals, the chief sensory organs; poll; cephalon.

) See Bennet. -- Herb Christopher (Bot.), an herb (Actæa spicata), whose root is used in nervous diseases; the baneberry. The name is occasionally given to other plants, as the royal fern, the wood betony, etc. -- Herb Gerard (Bot.), the goutweed; -- so called in honor of St. Gerard, who used to be invoked against th…

Having the ganglia of the nervous system unsymmetrically arranged; -- said of certain invertebrate animals.

Having the ganglia of the nervous system symmetrically arranged, as in certain invertebrates; -- opposed to heterogangliate.

A nervous affection, occurring almost exclusively in women, in which the emotional and reflex excitability is exaggerated, and the will power correspondingly diminished, so that the patient loses control over the emotions, becomes the victim of imaginary sensations, and often falls into paroxism or fits.…

imitive, embryonic, undifferentiated tissue, before conversion into connective, muscular, nervous, or other definite tissue.