Marcus Gunn phenomenon

jaw-·wink·ing syn·drome

[MIM*154600]

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

Farlex Partner Medical Dictionary © Farlex 2012

Marcus Gunn pupil

A change in the pupillary reflex, caused by unilateral optic nerve or retinal disease.

Method
A light is shone, first on one eye and then the other, with the opposite eye covered; the affected eye demonstrates a slight contraction or dilation of the pupil.

Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

Marcus Gunn phenomenon

Marcus Gunn pupillary sign, swinging flashlight Neurology A change in the pupillary reflex, caused by unilateral optic nerve or retinal disease; a light is shined, first on one, then the other eye with the opposite eye covered; the affected eye demonstrates a slight contraction or dilation of the pupil

McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

jaw-wink·ing syn·drome

(jaw'wingk'ing sin'drōm)

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 ptosis when the mouth is closed.
Synonym(s): Gunn syndrome, Marcus Gunn phenomenon, Marcus Gunn syndrome.

Medical Dictionary for the Health Professions and Nursing © Farlex 2012

Marcus Gunn phenomenon

See JAW WINKING.

Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005