The corneomandibular reflex, also known as the corneopterygoid reflex or Wartenberg’s reflex or sign, consists of anterolateral jaw movement following corneal stimulation. In one study, the corneomandibular reflex was observed in about three-quarters of patients with motor neurone disease (MND) who displayed no other pathological reflexes, a frequency much higher than that seen in patients with stroke causing hemiparesis or pseudobulbar palsy. It was therefore suggested to be a sensitive indicator of upper motor neurone involvement in MND.
Okuda B, Kodama N, Kawabata K, Tachibana H, Sugita M. Corneomandibular reflex in ALS. Neurology 1999; 52: 1699-1701 Schott JM, Rossor MN. The grasp and other primitive reflexes. Journal of Neurology, Neurosurgery and Psychiatry 2003; 74: 558-560