Trigeminal nerve:The chiefnerveofsensationfor the face, which is also themotornerve that controls the muscles used for chewing. Problems with thesensorypart of thetrigeminal nerveresultinpain or loss of sensation in the face. Problems with the motor root of the trigeminal nerve result in deviation of thejawtoward the affected side and trouble chewing. The trigeminal nerve is thefifth cranial nerve.
