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Cranial Nerves

Anatomy Exam 2

TermDefinition
CN I Olfactory nerve Function: smell Location of receptors: nasal cavity Pathway through skull: olfactory foramina of cribriform of ethmoid bone
CN II Optic nerve Function: vision Location of receptors: retina Pathway through skull: optic foramen Some visual info crosses at optic chiasm
CN III Oculomotor nerve Function: motor control of inferior oblique, inferior rectus, superior rectus, medial rectus, levator palpebrae, pupil size, lens shape Pathway through skull: superior orbital fissure
CN IV Trochlear nerve Function: motor control of superior oblique Pathway through skull: superior orbital fissure
CN V1 Ophthalmic branch of trigeminal nerve Function: sensation from skin of forehead (supraorbital foramen), cornea, paranasal sinuses Pathway through skull: superior orbital fissure
CN V2 Maxillary branch of trigeminal nerve Function: sensation from skin of maxillary area (infraorbital foramen), paranasal sinuses, upper teeth Pathway through skull: foramen rotundum
CN V3 Mandibular branch of trigeminal nerve Function: sensation from skin of chin (mental foramen), lower teeth, anterior 2/3 of tongue, motor control of muscles of mastication Pathway through skull: foramen ovale
CN VI Abducens nerve Function: motor control of lateral rectus Pathway through skull: superior orbital fissure
CN VII Facial nerve Function: motor control of muscles of facial expression, lacrimal gland, submandibular and sublingual salivary glands, taste from anterior 2/3 of tongue Pathway through skull: internal auditory meatus, then stylomastoid foramen
CN VIII Vestibulocochlear nerve Function: hearing and balance Pathway through skull: internal auditory meatus
CN IX Glossopharyngeal nerve Function: motor control of parotid salivary gland, taste and sensation from posterior 1/3 of tongue Pathway through skull: jugular foramen
CN X Vagus nerve Function: motor and sensation from larynx and pharynx, motor control of heart, bronchi, digestive tract Pathway through skull: jugular foramen
CN XI Accessory nerve Function: motor control of trapezius and sternocleidomastoid Pathway through skull: jugular foramen Originates from upper cervical spinal cord and enters foramen magnum before exiting jugular foramen
CN XII Hypoglossal nerve Function: motor control of tongue muscles Pathway through skull: hypoglossal foramen
Created by: zhu00276
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