Jaw winking | definition of jaw winking by Medical dictionary
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quick opening and closing of the eyelids.
jaw winking involuntary closing of the eyelids associated with jaw movements.
a paradoxic movement of eyelids associated with movements of the jaw.
jaw winking Marcus-Gunn phenomenon Neurology Elevation of a ptoptic eye by jaw movement, as seen in AD congenital ptosis, due to faulty innervation of levator palpebrae.
jaw wink·ing (jaw wingk'ing)
A paradoxic movement of eyelids associated with movements of the jaw.
jaw winking An inherited condition, also known as the Marcus Gunn syndrome, in which there is a drooping eyelid (ptosis) that retracts suddenly and momentarily when the mouth is opened wide or the jaw is moved firmly to one side. In some cases, the same stimulus causes a normal eye to close tightly. The condition is caused by an abnormal distribution of twigs of the motor nerves of the facial and jaw muscles. (R. Marcus Gunn, 1850–1909, Scottish ophthalmologist).