Cranial Nerve Diseases [Disease/Finding] Trigeminal Nerve Diseases [Disease/Finding] Trigeminal Nerve Disorders 64309007 M0328651 C8472 Fifth Cranial Nerve Diseases Cranial Nerve V Diseases Trigeminal Nerve Diseases Trigeminal Neuropathy C0152177 D020433 Diseases of the trigeminal nerve or its nuclei, which are located in the pons and medulla. The nerve is composed of three divisions: ophthalmic, maxillary, and mandibular, which provide sensory innervation to structures of the face, sinuses, and portions of the cranial vault. The mandibular nerve also innervates muscles of mastication. Clinical features include loss of facial and intra-oral sensation and weakness of jaw closure. Common conditions affecting the nerve include brain stem ischemia, INFRATENTORIAL NEOPLASMS, and TRIGEMINAL NEURALGIA. Trigeminal Nerve Diseases N0000004147 1025232