The winking reflex (WR) to electrical stimulation of the supraciliary region has two components , whose latent periods (LP) are identical to those observed during mechanical tapping on this region [Ii]. It has been shown that the ipsilateral early component (EC) has an LP of 12 msec, whereas the bilateral late component (LC) has an LP of 21-40 msec. Changes in the parameters of WR have been studied in patients with facial neuritis, trigeminal neuralgia, and compression of the trigeminal nerve by an intracranial space-occupying lesion, in polyneuropathy, multiple sclerosis, the Wallenberg-Zakharchenko syndrome, parkinsonism, etc. [i-I0]. In previous publications parameters of WR such as duration (D) and the shape of EC were disregarded and electromyographic characteristics of the orbicularis oculi muscle (its amplitude A, frequency, and the average of minimal amplitudes Ami n) were not analyzed.