-
I. Olfactory
Sensory impulses of sense of smell
-
II. Optic
Sensory impulses of vision
-
III. Occulomotor
- -Directs eyeball, raises eyelid (somatic)
- -constricts pupil (autonomic)
- -contains proprioceptors (sensory)
-
IV. Trochlear
Controls supraorbital oblique muscle of the eye (motor)
-
V. Trigeminal
3 divisions:
- V1-sensory impulses from skin of anterior scalp, upper eyelid, nose, nasal cavity mucosa, lacrimal glands
- V2-sensory impulses form nasal cavity mucosa, palate, upper teeth, lower eyelid
- V3-sensory impulses from anterior tongue, lower teeth, skin of chin, temporal region of scalp
-
VI. Abducens
Somatic motor fibers to lateral rectus
-
VII. Facial
Innervates facial expression; chief motor nerves of face, parasympathetic impulses to glands in face (lacrimal, salivary, etc.), sensory impulses from taste buds
-
VIII. Vestibulocochlear
Impulses for sense of equilibrium, sense of hearing
-
IX. Glossopharyngeal
Somatic motor fibers and proprioceptors to stylopharyngeus (elevates pharynx in swallowing), parasympathetic motor fibers for taste and general sensory to pharynx and posterior tongue, chemoreceptors in carotid body
-
X. Vagus
Mostly parasympathetic nerves; supplies heart, lungs and abdominal viscera, help regulate heart rate, breathing, and digestive activity; sensory impulses from thoracic and abdominal viscera, tastebuds of posterior tongue, pharynx
-
XI. Accessory
Motor fibers and proprioceptors to trapezius and sternocleidomastoid (which move head and neck)
-
XII. Hypoglossal
Motor fibers and proprioceptors to muscles of tongue
|
|
