<prompt> Marcus gunn jaw winking phenomenon due to relation between which cranial nervesVII VIIIIII VV VIIIII VI  <response>: 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. 