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Cranial Nerves and Their Functions

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  • Cranial Nerve I

    Olfactory nerve: Responsible for the sense of smell.

  • Cranial Nerve II

    Optic nerve: Responsible for vision.

  • Cranial Nerve III

    Oculomotor nerve: Controls movement of eyelid, eyeball, lens, and pupil constriction.

  • Cranial Nerve IV

    Trochlear nerve: Controls movement of the eyeball.

  • Cranial Nerve V

    Trigeminal nerve: Provides sensations in head, face, and jaw and motor control of chewing.

  • Cranial Nerve VI

    Abducens nerve: Controls movement of the eyeball.

  • Cranial Nerve VII

    Facial nerve: Controls taste, facial expressions, tears, salivation, and facial sensations.

  • Cranial Nerve VIII

    Vestibulocochlear nerve: Responsible for equilibrium and hearing.

  • Cranial Nerve IX

    Glossopharyngeal nerve: Controls taste, swallowing, speech, and salivation.

  • Cranial Nerve X

    Vagus nerve: Controls taste, sensations from pharynx, swallowing, coughing, voice, GI tract smooth muscle contraction, heart rate reduction, and digestive secretion.

  • Cranial Nerve XI

    Accessory nerve: Controls swallowing and movement of head and shoulders.

  • Cranial Nerve XII

    Hypoglossal nerve: Controls speech and swallowing via tongue muscles.