Olfactory Optic Oculomotor Trochlear Trigeminal Abducens Facial Vestibulocochlear Glossopharyngeal Vagus Accessory Hypoglossal Olfactory Optic Oculomotor Trochlear Trigeminal Abducens Facial Vestibulocochlear Glossopharyngeal Vagus Accessory Hyoglossal

Site Contents, detailed listing Cranial Nerve I - Olfactory Nerve Overview Olfactory epithelium Peripheral course Central course of olfactory tract Areas of the rhinencephalon Major projections of the olfactory areas Cranial Nerve II - Optic Nerve Overview Sensory transduction - the retina Sensory transduction - hyperpolarization Central course Central course - visual fields Retinal projections to the primary visual cortex Visual deficits and damage to the retina Damage to the optic nerve Damage to the optic chiasm Damage posterior to the optic chiasm Damage to the optic radiation Cranial Nerve III - Oculomotor Nerve Overview Somatic motor component Actions of the extraocular muscles Actions of the extraocular muscles, cont'd Origin and central course Intracranial course Final innervation Vertical gaze Visceral motor component Origin and course Final innervation Pupillary light reflex Accomodation reflex Action of the ciliary muscle Lower motor neuron lesions Argyll-Robertson pupil Cranial Nerve IV - Trochlear Nerve Overview Origin and central course Intracranial course Final innervation Clincal correlation Unique features Cranial Nerve V - Trigeminal Nerve (No text has been entered yet.) Cranial Nerve VI - Abducens Nerve Overview Origin and central course Intracranial course Final innervation Coordination, lateral and medial rectus muscles Lower motor neuron lesion Upper motor neuron lesion Clinical correlation, MLF Syndrome Cranial Nerve VII - Facial Nerve Component overview Branchial motor component Origin and central course Intracranial course Intracranial course, cont'd Extracranial course & final innervation Voluntary control of facial muscles Voluntary control of facial muscles, cont'd Lower motor neuron lesion (LMN) Bell's palsy LMN lesions of the facial nerve LMN lesions, acoustic neuromas Upper motor neuron (UMN) lesions Overview, visceral motor component Origin and central course Intracranial course Greater petrosal nerve Chorda tympani Overview, special sensory component Peripheral course Central course Central course, cont'd Overview of general sensory component Central course Central course, cont'd Central course, cont'd Peripheral lesions of the facial nerve Peripheral lesions of the facial nerve, cont'd Cranial Nerve VIII - Vestibulocochlear Nerve (No text has been entered yet.) Cranial Nerve IX - Glossopharyngeal Nerve Overview of components Branchial motor overview Origin and central course Rostral medulla Intracranial course Extracranial course and final innervation Voluntary control of stylopharyngeus muscle Overview of visceral motor component Origin and central course Intracranial course Extracranial course and final innervations Hypothalamic influence Overview of viscreal sensory component Peripheral and intracranial course Central course Overview of general sensory component Peripheral course Central course Central course, cont'd Clinical correlation Overview of special sensory component Central course Cranial Nerve X - Vagus Nerve Overview of components Branchial motor overview Origin and central course Rostral medulla Intracranial course Extracranial and final innervation Pharyngeal nerve Superior laryngeal nerve Recurrent laryngeal nerve Voluntary control, pharynx and larynx Lower motor neuron lesions Lower motor neuron lesions, cont'd Overview, visceral motor component Origin and central course Intracranial course Extracranial course and final innervation Visceral sensory component Peripheral course Central course General sensory component Peripheral course Central course Central course, cont'd Clinical correlation Cranial Nerve XI - Accessory Nerve Overview of the accessory nerve Origin and central course - cranial root Intracranial course Extracranial course and final innervation Origin and central course - spinal root Central course Extracranial course and final innervation Control of the sternocleidomastoid and trapezius muscles Clinical correlations Cranial Nerve XII - Hypoglossal Nerve Overview Origin and central course Intracranial course Final innervation Voluntary control of the tongue muscles Gross anatomy & imaging references References Site credits School of Medicine Home Page

Last revised: March 22, 1998