Abstract
Themechanism for generating microvibration(MV) or minor tremor has been proposed by manyinvestigators.Rohracher (1955) postulated thethermoregulatory autonomic nervous system.Sugano and Inanaga (1960) proposed the reflex ofspinal cord by γmotor system, and Ozaki et al.(1962) insisted the ballistocardiogram by heart beat.The contribution of the upper central nenroussystem (CNS) to MV was also reported (Sugano andInanaga, 1960:Itoh, 1967). We have considered thatthe CNS contributs much effect upon three factorsstated above.The unifom-interpretation of themechanism of MV, however, has not been given yet.The aim of this investigation is to give the relation-ship between eyelid MV and electmoencephalogram(EEG) in order to study the contribution of the CNS on MV.
