Cranial Nerves

Olfactory Nerve

Olfactory Nerve

Cranial nerve 1 *purely sensory *sense of smell

Optic Nerve

Cranial Nerve II *purely sensory *sense of sight

Oculomotor Nerve

Cranial Nerve III *purely motor *stimulates the ciliary smooth muscle - constrict pupil and bend lens (parasympathetic funcion *moves eyeyball by controlling 4 eye skeletal muscles: medial rectus, inferior rectus, superior rectus, and inferior oblique *attaches to the brainstem *tested to check for brainstem activity (pupils fixed and dilated means that it is not functioning properly)

Trochlear Nerve

Cranial Nerve IV *moves eyeball by controlling the superior oblique skeletal muscle

Trigeminal Nerve

*Cranial Nerve V *responsible for sense of feeling on the face (three branches - forehead, upper jaw, and lower jaw)

Abducens Nerve

Cranial Nerve VI *purely motor *moves eyeball (abducts it) by controlling the lateral rectus eye muscle

Facial Nerve

Cranial nerve VII *Sensory - sense of taste for the front of the tongue. *Somatic Movement of the facial expression skeletal muscles *parasympathetic stimulation of salivary and lacrimal glands.

vestibulocochlear nerve

cranial nerve VIII *purely sensory *carries balance information and hearing to the temporal lobe for processing

glossopharyngeal nerve ("tongue and pharynx")

Cranial nerve IX. *Sense of taste for the back of the tongue. *Somatic movement of the skeletal muscles for swallowing *Parasympathetic stimulation of the parotid salivary glands. *carries baroreptor information from the carotid sinuses

Vagus nerve ("wanderer")

Cranial nerve X. *Sensory information from the internal organs -- particularly notable for connecting GI activity with the brainstem, and for carrying baroreceptor information from the heart to the brainstem. *Parasympathetic motor for internal (visceral) organs - slows heart, dilates bronchi, stimulates GI organs, etc.

accessory nerve

Cranial Nerve XI *purely somatic motor to move trapezius and sternocleidomastoid

hypoglossal ("under tongue")

Cranial Nerve XII *purely somatic motor *controls tongue skeletal muscles