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jaw-winking syndrome


Definition: an increase in the width of the palpebral fissures during chewing, sometimes with a rhythmic elevation of the upper lid when the mouth is open and with ptosis when the mouth is closed.

Synonym(s): Gunn phenomenon, Gunn syndrome, jaw-winking phenomenon, jaw-working reflex, Marcus Gunn phenomenon, Marcus Gunn syndrome

Further information

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.