Marcus gunn jaw winking phenomenon due to relation between which cranial nerves: (A) VII + VIII, (B) III + V, (C) V + VII, (D) III + VI
Answer is B. 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.