Chapter 9: Nervous System
Facial nerve (VII)
Conduct impulses: from taste buds of tongue to the brain; from the brain to the face muscles Main function: sense of taste; contraction of muscles of facial expression
Accessory nerve (XI)
Conduct impulses: from the brain to certain shoulder and neck muscles Main function: shoulder movements; turning movements of the head
Abducens nerve (VI)
Conduct impulses: from the brain to the external eye muscles Main function: eye movements
Trochlear nerve (IV)
Conduct impulses: from the brain to the external eye muscles Main function: eye movements
Oculomotor nerve (III)
Conduct impulses: from the brain to the eye muscles Main function: eye movements
Hypoglossal nerve (XII)
Conduct impulses: from the brain to the muscles of the tongue Main function: tongue movements
Vestibulocochlear nerve (VIII)
Conduct impulses: from the ear to the brain Main function: hearing; sense of balance
Optic nerve (II)
Conduct impulses: from the eyes to the brain Main function: vision
Olfactory nerve (I)
Conduct impulses: from the nose to the brain Main function: sense of smell
Trigeminal nerve (V)
Conduct impulses: from the skin and mucous membrane of head and from teeth to the brain; also from brain to chewing muscles Main function: sensations of face, scalp, and teeth; chewing movements
Glossopharyngeal nerve (IX)
Conduct impulses: from the throat and taste buds of tongue to the brain; also from the brain to the throat muscles and salivary glands Main function: sensations of the throat, taste, swallowing movements, secretion of saliva
Vagus nerve (X)
Conduct impulses: from the throat, larynx, and organs in thoracic and abdominal cavities to the brain; also from the brain to the muscles of throat and to organs in thoracic and abdominal cavities Main function: sensations of throat and larynx and of thoracic and abdominal organs; swallowing, voice production, slowing heartbeat, acceleration of peristalsis (gut movements)