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18 Cards in this Set
- Front
- Back
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CN I - Olfactory Nerve |
Main Action: Sense of smell Brain Connection: Inferior Frontal Lobe Associated Disorders: Anosmia (loss of sense of smell) |
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CN II - Optic Nerve |
Main Action: sense of vision Brain Connection: Diencephalon Associated Disorders: ipsilateral blindness, visual field cuts, abnormal pupillary light reflex |
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CN III - Oculomotor Nerve |
Main Action: motor to sup, inf, med rectus & inf oblique & levator palpebrae superioris - turns eye sup, inf, med - raises eyelid - accommodation - controls pupil size Brain Connection: ant midbrain Associated Disorders: ptosis, eye is directed down and out, diplopia, loss of pupillary and accommodation reflexes |
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CN IV - Trochlear Nerve |
Main Action: motor to Superior Oblique mm - intorts eye (medial rotation) and depression - in isolation = moves eye inferiolateral Brain Connection: posterior midbrain Associated Disorders: diplopia, difficulty reading, difficulty descending stairs |
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CN V - Trigeminal Nerve |
Main Actions: - Sensory to face and TMJ - Motor to muscles of mastication (V3) Brain Connection: Lateral Pons Associated Disorders: absent blink reflex (V1), jaw deviated toward damaged side, weakened muscles of mastication, trigeminal neuralgia |
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CN VI - Abducent Nerve |
Main Actions: motor to Lateral Rectus mm - turns eye laterally Brain Connection: b/w pons and medulla Associated disorders: eye will look medially, diplopia, lateral rectus paralysis |
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CN VII - Facial Nerve |
Main Action: -Sensory function: tears, salivation, taste -Motor Function: facial expression, closes eyes Brain Connection: b/w pons and medulla Associated Disorders: Bell's Palsy, lack of lacrimation, decreased salivation and taste sensation |
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Facial Nerve: Upper Motor Neuron Lesion |
- will spare the contralateral forehead - mild contralateral orbicularis occult weakness - mainly affects inferior portions of contralateral face Forehead receives bilateral innervation |
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Facial Nerve: Lower Motor Neuron Lesion |
- affects the entire half of ipsilateral the face - forehead is NOT spared |
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Facial Nerve Lesion: - Right Upper Motor Neuron lesion the forehead will still be receiving innervation for the Left UMN |
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Facial Nerve Lesion: - Left Lower Motor Neuron lesion ipsilateral face is affected |
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CN VIII - Vestibulocochlear Nerve |
Main Action: sensory, head position relative to gravity, head movement, hearing Brain Connection: b/w pons and medulla Associated Disorders: unilateral deafness, tinnitus, vertigo, disequilibrium, nystagmus |
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Conductive Hearing Loss |
bone conduction greater than air b/c bone conduction bypasses problems in external or middle ear |
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Sensorineural Hearing Loss |
Air conduction greater than bone in both ears, hearing decreased in affected ear |
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CN IX - Glossopharyngeal Nerve |
Main Action: -Sensory: taste to post 1/3 tongue, sensory from carotid body & sinus, general sensory ext ear, pharynx, middle ear -parasympathetic: parotid gland - salivation -motor: stylopharyngeus - swallowing Brain Connection: medulla Associated Disorders: w/ gag reflex, w/ swallowing reflex, dry mouth, loss of taste, dysregulation of HR |
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CN X - Vague Nerve |
Main Action: -Sensory: regulates viscera, swallowing, speech, taste, mucosa of laryngopharynx -motor: swallowing (pharyngeal constrictors) and vocal sounds Brain Connection: medulla Associated Disorders: difficulty speaking, swallowing, poor digestion, hoarseness, erratic HR |
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CN XI - Spinal Accessory |
Main Action: motor to trapezius and SCM - elevates shoulders and turns head Brain Connection: Spinal cord and Medulla Associated Disorders: ipsilateral paralysis of SCM and trapezius |
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CN XII - Hypoglossal Nerve |
Main Action: motor to intrinsic and extrinsic muscles of tongue Brain Connection: medulla Associated Disorders: ipsilateral tongue atrophy, deviation to ipsilateral side upon protrusion, difficulty w/ articulations that require tongue "la, la, la" |
