Cranial nerves function and testing
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each of the black spaces below before clicking
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| I Olfactory | Sensory | Use familiar scents
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| II Optic | Sensory | Visual acuity and visual field
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| III Oculomotor | Motor: eye movements, pupil constriction Sensory: proprioception | Pupillary reflex, tracking
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| IV Trochlear | Motor: movement of eye Sensory: proprioception | Downward and lateral movment of eye, superior oblique
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| V Trigeminal | Motor: mastication Sensory: sensation for pain, touch, pressure, temperature. Decasates at the Pons. Primary sensory nerve to face and tongue. There are three branches: opthalimic, maxillary, mandibular | Motor: palpate masseter Sensory: lightly stroke face
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| VI Abducens | Motor: movement of eye Sensory: proprioception | Lateral movement of eye and lateral rectus muscle
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| VII Facial | Motor: facial expression, glandular secretion Sensory: taste for anterior 2/3 tongue. If there is damage you will get mask like apperence with minimal or no facial expressions. This nerve decasates at the Pons | check symmetry of facial muscles, check taste for anterior 2/3 tongue
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| VIII Vestibulocochlear | Sensory Cochlear: hearing Vestibular: equilibrium | Cochlear: tuning fork Vestibular: REM and loss of balance
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| IX Glossopharyngeal | Motor: swallowing/secretion of saliva Sensory: taste for posterior 1/3 tonge. Decasates at the medulla. provides some sensory infor for parts of the ear and senory and motor for the pharynx. Damage would effect swallowing and loss of tast | Motor: gag reflex, say "ah" Sensory: test for bitters
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| X Vagus | Motor: somatic control of speech, visceral control of smooth muscle Sensory: impulses from viscera. Decassates at the meduella. There are two branches, the superior and inferior. Known as the "wandering" nerver- effects the larynx, lungs and esophogus. | Ability to speak/swallow. Effects mm of velum
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| XI Accessory (spinal) | Motor: swallowing and movement of head Sensory: proprioception. effects levator veli palatini and uvula and SCM | Turn head against resistance
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| XII Hypoglossal. Crosses at medulla | Motor: movment of tongue during speech and swallowing Sensory: proprioception. Damage would effect the tongue. | protrude tongue, articulation of words
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Created by:
mmason
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