PHYSIOLOGICAL TREMOR

Abstract

Physiological tremor, or rhythmicity during muscular contraction, was studied by means of an accelerometer double diode (Mullard DDR 100) and recorded by ink-writer and oscilloscope. A frequency of about 10 CPS was recorded at a number of sites in normal adults. On loading the limb the amplitude was frequently decreased but the frequency was unchanged. The frequency in normal children is slower. The tremor is probably independent of the eeg. There is no definite evidence that the frequency is synchronized with motor units. The constancy of the frequency may be due to a fusion of twitches at higher rates.