Dento-corneal aberrant regeneration as evidence of V2 innervation of the inferior human cornea

Aberrant regeneration (AR) of axons may occur following nerve trauma or compression and causes axonal signals to be misdirected to structures other than their original targets. Ocular–oral synkinesis and gustatory hyperlacrimation (crocodile tears), which can each follow facial nerve palsy, are examples of motor and autonomic AR, respectively. Somatosensory AR is rarely reported, and causes the referral of a sensory stimulus at one location to a distant site; the referred sensation is usually perceived as more noxious than the initiating stimulus.1