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Cranial Nerves w/ Pictures

Terms in this set (12)

Olfactory nerve
CN-1 Carries infromation from nose to brain. Concerned with sense of smell. Damage shows loss of sense of smell (anosmia) and loss of taste
Optic nerve
CN-II, transmits visual information from the retina to the brain.
Oculomotor nerve
CN-III Voluntary motor to muscles that move the eye and a muscle that elevates the eyelid, and involuntary motor involved with constriction of the pupil.
Trochlear nerve
CN-IV is motor nerve Innervates one of the extrinsic muscles of eyeball, helping move eyeball. Damage is double vision and inability to rotate eye properly., smallest cranial nerve
Trigeminal nerve
CN-V; largest cranial nerve, is a mixed nerve with ophthalmic, maxillary and mandibular branches and its motor neurons originate in the pons, the main sensory nerve of the face and motor nerve for the muscles of mastication, nerve that links smell to taste
Abducens nerve
CN-VI is primarily motor nerve that controls eye movement by innervating only 1 extrinsic eye muscle. Damage prevents lateral rotation of eye. Eyes drift medially (toward the nose).TEST ABILITY OF EYES TO FOLLOW A MOVING OBJECT,
Facial nerve
CN-VII is mixed nerve, mostly motor functions. allows to smile, frown & make other faces. Stimulates saliva & tears & blinking, keeps cornea moist. Also taste. Damage to this area shows expression absent from one side. Bell's Palsy
Vestibulocochlear nerve
NVIII; contains the vestibular nerve, which monitors sensations of balance, position, movement and the cochlear nerve, which monitors hearing receptors, Provides hearing and sense of balance--damage produces deafness, dizziness, nausea, loss of balance & nystagmus
Glossopharyngeal nerve
CN-IX cranial nerve which provides sensation to fibers in the POSTERIOR 1/2 of tongue, mid ear, Eustachian tube. and provides motor function to the uvula and soft tissue palate. Test taste and watch throat while saying "AHH" (9), damage results in loss of bitter & sour taste & impaired swallowing
Vagus nerve
CN X; mixed; exits through tymanooccipital fissure; motor and sensory to viscera of neck and thoracic and abdominal cavities; damage - laryngeal paralysis, dysphagia, enlarged esophagus, GI signs, bradycardia, tachycardia
Accessory nerve
CN XI Provides swallowing, head, neck & shoulder movement--damage causes impaired head, neck & shoulder movement, head turns towards injured side
Hypoglossal nerve
CN-XII is primarily motor nerve. Controls movement of tongue, affecting speaking & swallowing. Damage causes tongue to deviate toward the injured site.
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