Cranial Nerves

Cranial Nerves - Dr. Ter-Mikaelian Cranial Nerves Abbr. I...

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Unformatted text preview: Dr. Ter-Mikaelian Cranial Nerves Abbr. I II III Name Olfactory Optic Oculomotor IV Trochlear V Trigeminal VI VII Abducens Facial VIII Auditory/ Vestibulocochlear IX Glossopharyngeal Both X Vagus Both Type Function Sensory Carries smell signals to brain Sensory Carries visual signals to brain Motor Controls some extrinsic eye muscles (move eye, eyelids) Controls intrinsic eye muscles (constrict pupil, accommodate for distance) Motor Controls an extrinsic eye muscle (sup. oblique) Both Responsible for sensation in part of face and mouth, and control of mouth. Three parts: Eye (ophthalmic) Cheek (maxillary) Jaw (mandibular) Motor Controls an extrinsic eye muscle (lateral rectus) Both Controls facial expression muscles Carries taste signals to brain from anterior 2/3 of tongue Parasympathetic innervation of glands of face Sensory Carries hearing and balance signals to brain Carries taste signals to brain from posterior 1/3 of tongue Carries sensory info from pharynx, body (ANS*) Controls pharyngeal muscles Parasympathetic innervation of parotid glands (salivary) Carries sensory signals from pharynx, larynx Controls muscles of soft palate, pharynx, larynx Effects of Injury Loss of sense of smell Loss of sight on affected side Inferior and lateral deviation of eye (leads to double vision) Eyelid drooping (ptosis) Pupil dilation Blurred vision due to lack of accommodation Superior and medial deviation of eye (leads to double vision) Loss of sensation in face Weakness in biting and chewing Trigeminal neuralgia (shock‐like pain in parts of face) Medial deviation of eye (leads to double vision) Facial palsy (Bell’s palsy) – weakness or paralysis of facial muscles Loss of taste to anterior 2/3 of tongue Decreased salivation Loss of hearing Loss of balance and equilibrium Possible nausea, vertigo, vomiting Loss of taste to posterior 1/3 of tongue Difficulty swallowing Decreased salivation Difficulty swallowing Hoarseness of voice Uvula deviation away from side of dysfunction Dr. Ter-Mikaelian …X XI (Spinal) Accessory Motor XII Hypoglossal Motor *ANS = autonomic nervous system Carries sensory signals from thoracic and abdominal viscera (ANS) Parasympathetic innervation of thoracic and abdominal viscera Controls neck and upper back muscles (trapezius, sternocleidomastoid) Controls tongue and throat muscles Potential visceral dysfunction Difficulty elevating scapula, rotating neck When protruded, tongue deviates to side of damaged nerve ...
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This note was uploaded on 04/05/2012 for the course ES 01:377:213 taught by Professor Dr.mariater-mikaelian during the Spring '12 term at Rutgers.

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