jaw-winking syndrome inverse Marcus-Gunn phenomenon https://www.malacards.org/card/inverse_marcus_gunn_phenomenon UMLS:C5548210 icd11.foundation:348052110 MONDO:0020362 Orphanet:98951 GARD:0019608 Inverse Marcus-Gunn phenomenon is a rare congenital synkinesis where jaw opening by the pterygoid muscle (during eating or yawning) causes eyelid drooping from inhibition of the oculomotor nerve to the levator palpebrae superioris. Familial occurrence has been reported. MEDGEN:1784220