Cranial Nerves

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16 Terms

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Order of all Nerves

I. Olfactory

II. Optic

III. Oculomotor

IV. Trochlear

V. Trigeminal

VI. Abducens

VII. Facial

VIII. Vestibulocochlear

IX. glossopharyngeal

X. Vagus

XI. Accessory

XII. Hypoglossal

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I. Olfactory nerve

  • Sensory

  • Passes through cribiform plate

  • Carry afferent impulses for sense of smell


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II. Optic nerve

  • sensory

  • runs through optic canal, then crosses over at optic chiasm, then runs to occipital cortex

  • carry afferent impulses for vision


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III. Oculomotor nerve

  • motor nerve

  • superior orbital fissue

    • innervates 4 of the 6 extrinsic eye muscles AND parasympathic motor fibers allow pupils to contrict


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IV. Trochlear Nerve

  • motor

  • superior orbital fissure

  • innervates superior oblique muscle


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V1. Ophthamic division of Trigeminal nerve

  • sensory

  • superior orbital fissure

  • sensation of forehead


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V2. Maxillary division of trigeminal nerve

  • Sensory

  • foramen rotundum

  • sensation of middle face


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V3. Mandibular division of trigeminal nerve

  • motor and sensory

  • foramen ovale

  • sensation of bottom of face and anterior tongue; innervates muscles of mastication


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VI. Abducens Nerve

  • Motor

  • superior orbital fissure

  • innervates lateral rectus muscle


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VII. Facial nerve

  • both

  • internal acoustic meatus

  • innervates muscles of facial expressions and taste for 2/3 of the tongue


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Branches of facial nerve

Temporal, zygomatic, buccal, mandibular, cervical

(to zanzibar by motor car)

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VIII. Vestibulocochlear nerve

  • sensory

  • internal acoustic meatus

  • impulses for hearing and equilibrium


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IX. Glossopharyngeal nerve

  • both

  • jugular foramen

  • sensory for posterior 1/3 of tongue and parasympathetic motor nerves for salivary glands. Also motor nerve for sytlopharyneus


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X. vagus nerve

  • both

  • jugular foramen

  • parasympathetic motor nerves for 2/3 of GI (increases digestion) and sensory of tongue


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XI. Accessory Nerve

  • motor

  • jugular foramen

  • innervates sternocleidomastoid and trapezius


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XII. Hypoglossal Nerve

  • motor

  • hypoglossal canal

  • innervates muscles of the tongue