A form of acquired facial synkinesis manifesting as involuntary eyelid closure on jaw opening. Often follows an aberrant regeneration of the facial nerve after a peripheral facial palsy.
Eyelid closure occurs due to orbicularis oculi (CN VII) contraction rather than inhibition of levator palpebrae superioris (CN III) as is seen in inverse Marcus Gunn phenomenon
- Eyelid closure (CN VII)
- Jaw opening