Physiological Properties of the Microvibration of the Skin Surface of the Upper Eyelid

Abstract

The microvibration (MV) of the left upper eyelid was recorded by means of a MV-recording technique in normal adults with eyes closed. Electromyogram (EMG) of the orbicularis oculi muscles, apex cardiogram (ACG) and electroencephalogram (EEG) were also traced simultaneously. The time- and frequencypatterns of the lid MV were obtained by the digital real-time correlator and spectrum analyzer, respectively. It was found that the lid MV of healthy awaked subjects with their eyes closed contained faster components with high amplitude probably due to changes in muscle tone of the orbicularis oculi muscles in addition to so-called ballistocardiographic components.