Difference between revisions of "File:Collier's sign.jpg"

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Figure 1. Collier’s sign in a 70-yo-man who suffered a right midline thalamic/rostral midbrain hemorrhagic stroke causing a pretectal (Parinaud's) syndrome. There was prominent eyelid retraction (Collier's sign), a left pseudo-abducens, and upgaze palsy with convergence retraction nystagmus. Eyelid retraction is thought to be related to damage of the M-group, which is adjacent to the riMLF. The M-group sends projections to the central caudal subnucleus of the oculomotor nucleus that innervates the levator palpebrae muscles. Disruption of these pathways can lead to eyelid retraction. (Figure courtesy Dr. Daniel Gold, The Daniel Gold Collection, Neuro-ophthalmology Virtual Education Library: NOVEL http://NOVEL.utah.edu, Spencer S. Eccles Health Sciences Library, University of Utah, Reference URL https://collections.lib.utah.edu/ark:/87278/s6797vq6

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