Sunday, April 30, 2017

Collier's Sign

Hey guys!

Collier’s sign (“posterior fossa stare,” “tucked lid” sign) is elevation and retraction of the upper eyelids, baring the sclera above the cornea, with the eyes in the primary position or looking upward.

This may be seen with upper dorsal midbrain supranuclear lesions (e.g., Parinaud’s syndrome). There may be accompanying paralysis of vertical gaze (especially upgaze) and light-near pupil-
lary dissociation.

The sign is thought to reflect damage to the posterior commissure levator palpebrae superioris inhibitory fibers; causing overactivity of this muscle.


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