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Ophthalmology General c1191cb5

Marcus gunn jaw winking phenomenon due to relation between which cranial nerves

A
VII + VIII
B
III + V
C
V + VII
D
III + VI
High-Yield Explanation
Ans. is 'b' i.e., III + V Marcus Gunn phenomenon (a.k.a. Marcus Gunn Jaw-Winkingor Trigemino-oculomotor Synkineses) IT is an autosomal-dominant condition with incomplete penetrance, in which nursing infants will have rhythmic upward jerking of their upper eyelid. This condition is characterized as a synkinesis: when two or more muscles that are independently innervated have either simultaneous or coordinated movements.

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