Cranial 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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Smell (sensory)

Vision (sensory)

Eye movement; pupil constriction (motor)

Eye movement (motor)

Somatosensory information (touch, pain) from the face and head; muscles for chewing. (both)

Eye movement (motor)

• Taste (anterior 2/3 of tongue); somatosensory information from ear; controls muscles used in facial expression. (both)
• Exits skull at stylomastoid foramen and passes through parotid gland (does not innervate it)
• does not bring back sensation from face

Hearing; balance (sensory)

Taste (posterior 1/3 of tongue); Somatosensory information from tongue, tonsil, pharynx; controls some muscles used in swallowing. (both)

Sensory, motor and autonomic functions of viscera (glands, digestion, heart rate. Parasympathetic (both)

Controls muscles used in head movement. (motor)

Controls muscles of tongue. (motor)

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• Opthalmic (V1)
• Maxillary (V2)
• Mandibular (V3)

Innervates: muscles of mastication (motor) and skin of lower jaw (sensory)

Innervates: skin over cheek area to under nose

Innervates: skin over forehead and nose; cornea of eye

• Back of head: Greater occipital n. (C2)
• Behind ear: lesser occipital n. (C2)
• Under ear and jaw: Greater auricular n. (C2)
• Jaw: Mandibular n. (CN V3)
• Cheekbone to under nose: Maxillary n. (V2)
• Forehead down nose: Opthalmic n. (V1)