TREMOR

(Lat.), n. m. Trem(tream)'oar. Gen., -or'ts. From tremere, to tremble. Fr., tremblement. Ger., Zittern. A quivering or trembling, especially a more or le continuous quivering of a convulsive character. [D.] Arsenical t. T. caused by arsenical neuritis, [o, 34.] Continuous t. A form of t. that resembles that of paralysis agitans, but may be remittent. Muscular tension is not exaggerated, as in intermittent t., and the t. may be diminished or arrested by a voluntary effort. [D, 35.] Convulsive t. 1. Of Hammond, a paroxysmal affection characterized by frequent attacks of violent trembling, lasting fifteen or twenty minutes, and leaving the subject in a profuse perspiration. There are also headache, vertigo, anxiety, hyperaesthesia of the skin of the face, arms, and trunk (the parts usually involved in the paroxysms), and sometimes unconsciousne . 2. Any short shaking of the body, such as occurs occasionally after urination. Hammond includes all cases of non-rhythmical t., or clonic convulsive movements which are paroxysmal in character, but are not attended with lo of consciousne . [D, 25, 34.] Epileptoid t. Intermittent clonus with t. Fibrillary t. T. caused by the consecutive contractions of separate muscular fibrillae, rather than of a muscle or the muscles as a whole. [D, 36.] Forced t. See T. coact us. Hysterical t. T. due to the instability of nervous impulse existing in hysteria. 34.] Intermittent t. T. common to paralyzed muscles in ti,emiplegia. It is induced when the muscles are put upon the stretch by attempts at voluntary movement. [D, 35.] Mercurial t., Metallic t. A volitional t. due to mercurialism. [D, 25.] Muscular t. Slight oscillating muscular contractions following each other in rhythmical order. [L, 20 (o, 34).] Purring t. See Puri-ing THRILL. T. capitis. T. affecting the muscles of the neck and head, [a, 34.] T. coact us. Forced t.; of Van Swieten, the convulsive movements which persist during repose after voluntary exercise; attributed to an intermittent and rhythmical irritation of the nervous centres. [D, 35.] T. sat iiriiiims. T. due to lead poisoning. [L, 57 (a, 14).] T. tendinum. See SUBSULTUS tendinum. Vibratile t. See FREMITUS. Volitional t. Trembling of the limbs or of the entire body when a voluntary effort is made. It occurs in connection with multiple sclerosis and other nervous diseases. [D, 63.] [s. 642]