3/8/2023 0 Comments Complete anatomy innervationIt has three divisions (ophthalmic, maxillary and mandibular). It is the afferent limb of the corneal reflex CN VII is the bilateral efferent limb.ĬN V emerges from the pons. Spinal – pain, temperature, crude touch.Principal – light touch and discrimination.It passes through the superior orbital fissure of the skull.ĬN V is the trigeminal nerve. It assists in depressing and abducting the eye.ĬN IV connects to the midbrain and is the only cranial nerve to leave the pontomesencephalic junction posteriorly. It provides general somatic efferent to the extraocular superior oblique muscle. It passes through the superior orbital fissure of the skullĬN IV is the trochlear nerve. CN III palsy causes a ‘down and out’ eye.ĬN III connects to the midbrain. The muscles are the levator palpebrae superioris, inferior oblique, and superior, medial and inferior recti. It is the efferent limb for the pupillary light reflex. It provides general somatic efferent and general visceral efferent fibres to the extraocular muscles and pupillary constrictor muscles respectively. It is the afferent limb for the pupillary light reflex.ĬN II connects to the brain (not the brainstem). It passes through the optic canal of the skullĬN III is the oculomotor nerve. It provides special somatic afferent fibres for vision. It passes through the cribriform plate of the skullĬN II is the optic nerve. It provides special visceral afferent fibres for the sense of smell.ĬN I connects to the brain (not the brainstem). Efferent fibres carry motor information away from the brain.ĬN I is the olfactory nerve. SVE (special visceral efferent): provide motor innervation to skeletal muscles of the pharyngeal archesĪfferent fibres carry sensory information back to the brain.GVE (general visceral efferent): provide secretomotor function to smooth muscle and glands.GSE (general somatic efferent): provide motor innervation to skeletal muscles.SVA (special visceral afferent): receive sensory information from the endodermal nose and tongue.SSA (special somatic afferent): receive sensory information from the ectodermal retina, cochlear and vestibular apparatus.GVA (general visceral afferent): receive sensory information from the viscera (organs).GSA (general somatic afferent): receive sensory information from the skin, skeletal muscles and joints.A nucleus refers to a collection of neuronal cell bodies within the central nervous system and they give rise to one of seven major types of fibres (below): The cranial nerve nuclei will be covered in more detail in each cranial nerve article. ![]() Cranial nerves and cranial foramina diagram. You can also check out our cranial nerve anatomy quiz here. Download our cranial nerves PDF summary table here.
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