Exam 4 Cranial Nerve Functions

Olfactory Nerve

Sensory: for special sense of smell

Optic Nerve

Sensory: for special sense of vision

Oculomotor Nerve

• Motor: to eye muscles and upper eyelid

• Parasynthetic: to schincter pupillae and the ciliary muscle of the lens

Trochlear Nerve

• Motor: to an eye muscle

Trigeminal Nerve- Opthalmic Branch

• Sensory: from scalp, forehead, nose, upper eyelid, and cornea

Trigeminal Nerve- Maxillary Branch

Sensory: from palate, upper jaw, upper teeth and gums, nasopharynx, nasal cavity, skin, mucous membranes of the cheek, lower eyelid, and upper lip

Trigeminal Nerve- Mandibular Branch

• Sensory: from lower jaw, lower teeth and gums, anterior 2/3 of tongue, mucous membrane of cheek, lower lip, skin of cheek and chin, auricle, and temporal region.

• Motor: to mastification muscles, temporalis, lateral, and medial, soft palate, throat, and middle ear.

Abducens Nerve

Motor: to an eye muscle

facial Nerve

• Sensory: to special sense of taste on anterior 2/3 of tongue.

• Motor: to facial muscles, throat, and middle ear.

• Parasympathetic: to submandibular and sublingual salivary glands, lacriminal gland, and glands in the nasal cavity and palate.

Vestibulocochlear Nerve

Sensory: for special sense of hearing and balance

Glossopharyngeal

• Sensory: for special sense of taste on posterior 1/3 of tongue; sensory from pharynx, palatine tonsils, posterior 1/3 of tongue, middle ear, carotid sinus, and carotid body.

• Motor: to pharyngeal muscle

• Parasympathetic: to parotid salivary gland, glands of the posterior 1/3 of tongue.

Vagus Nerve

• Sensory: from inferior pharynx, larynx, thoracic and abdominal organs, and special sense of taste from posterior tongue.

• Nervous: to soft palate, pharynx, intrinsic laryngeal muscles, and an extrinsic tongue muscle.

• Parasynthetic: to thoracic and abdominal viscera

Accessory Nerve

Motor: to sternocleidomastoid and trapezius

Hypoglossal Nerve

Motor: to intrinsic and extrinsic tongue muscles and throat muscles