NS Flashcards
Carries smell impulses from nasal mucous membrane to brain.
I (olfactory)
Sensory
Carries visual impulses from eye to brain.
II (optic)
Sensory
Contracts eye muscles to control eye movements (interior lateral, medial, and superior), constricts pupils, and elevates eyelids.
III (oculomotor)
Motor
Contracts one eye muscle to control inferomedial eye movement.
IV (trochlear)
Motor
Carries sensory impulses of pain, touch, and temperature from the face to the brain. Influences clenching and lateral jaw movements (biting, chewing).
V (trigeminal)
Sensory motor
Controls lateral eye movements.
VI (abducens)
Motor
Contains sensory fibers for taste on anterior two-thirds of tongue, and stimulates secretions from salivary glands (submaxillary and sublingual) and tears from lacrimal glands.
VII (facial)
Sensory
Supplies the facial muscles and affects facial expressions (smiling, frowning, closing eyes).
VII (facial)
Motor
Contains sensory fibers for hearing and balance.
VIII (acoustic, vestibulo- cochlear)
Sensory
Contains sensory fibers for taste on posterior third of tongue and sensory fibers of the pharynx that result in the gag reflex when stimulated.
IX (glossopharyngeal)
Sensory
Provides secretory fibers to the parotid salivary glands; promotes swallowing movements.
IX (glossopharyngeal)
Motor
Carries sensations from the throat, larynx, heart, lungs, bronchi, gastrointestinal tract, and abdominal viscera. Promotes swallowing, talking, and production of digestive juices.
X (vagus)
Sensory motor
Innervates neck muscles (sternocleidomastoid and trapezius) that promote move- ment of the shoulders and head rotation. Also promotes some movement of the larynx.
XI (spinal accessory)
Motor
Innervates tongue muscles that promote the movement of food and talking.
XII (hypoglossal)
Motor
