Tremor

(trem' -or). An involuntary trembling or agitation of the body, or some part of it. T., Arsenical, a tremor the result of arsenical intoxication. T. capitis, tremor affecting the muscles of the neck and head. T. coact us. Synonym of 7"., Forced. T., Continuous, a form of tremor that of paralysis agitans; it is, however, likely to be remittent, and may be diminished or arrested by voluntary effort. T., Convulsive. See Para myoclonus . T., Epileptoid, intermittent clonus with tremor. T., Fibrillary, tremor caused by consecutive contractions of separate muscle-fibrillae. T., Forced, the convulsive movements persisting during repose after voluntary motion, due to an intermittent and rhythmic irritation of the nervous centers. T., Hysteric, the tremor observed in hysteria, and due to the uncertainty of nervous impulse. T., Intention, one appearing on voluntary movement T., Intermittent, the tremor commonly observed in hemiplegics on any attempt at voluntary motion. T., Mercurial, a peculiar form of tremor observed among smelters and others exposed to the fumes of mercury. It is sudden or gradual in onset, and is usually unaccompanied by salivation. The arms are first involved, and then the entire muscular system. If allowed to go on, paralysis, mania, and idiocy may result. T., Muscular, slight, oscillating, rhythmic muscular contractions. T., Purring. Synonym of Purring Thrill. T. saturn in us, the tremor of lead poisoning. T. tendinum. Synonym of Subsultus tendinum. T., Vibratile. Synonym of Fremitus. T., Volitional, a trembling of the entire body during voluntary effort, as observed in multiple sclerosis. See T, Intentional.