Potential Changes and Microvibration Responses in the Eyelid Elicited by Single Flash Stimulation.

The potential changes and microvibration (MV) responses caused in the upper eyelid by single flash stimulation to both eyes or a single eye were obtained with the summation technique and their physiologic properties were investigated in healthy resting subjects with eyes closed. It seems likely that the lid potentials evoked photically mainly consist of electromyographic components due to the excitation of the orbicularis oculi through photopalpebral reflex and probably electroretinographic component, because of its disappearance in the occluded eyelid. .................. potential; microvibration response; eyelid; flas

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