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Cranial Nerves

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Number
Name
Origin
Termination
Function
Sensory, Motor, Or Both
I   Olfactory   Epithelium of nasal cavities   Olfactory Bulb   smell   Special Sensory  
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II   Optic   Retina of eye   Thalamus and Optical Cortex   sight   Special Sensory  
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III   Oculomotor   Midbrain   Eye   motor to muscles that move the eye, constrictor pupillae, ciliary musdcles   Somatic Motor- innervates 4 of 6 extraocular muscles, Visceral Motor- parasympathetic, innervates constrictor pupillae and ciliary muscles  
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IV   Trochlear   Midbrain   Eye   Motor to muscles that move the eye   Somatic Motor- innervates one extraocular muscle  
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V   Trigeminal   Pons   Mandible, maxillary, eye   motor to muscles of mastication, tensor tympani and tensor veli palatini. Sensory from the majority of the head and neck including the teeth and gingival   SOmatic Sensory- receive impulses from face and head, carry impulses of pain, touch and temp, proprioception. Branchial Motor- fibers to muscles of mastification, tensor tympani, tensor palatini  
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VI   Abducens   Inferior region of Pons   Lateral rectus muscle of eye   Motor to muscles that move the eye (laterally)   Somatic Motor- motor to one extraocular muscle  
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VII   Facial   Pons   face and tongue   motor to muscles of facial expression, motor to glands in head (lacrimal, submandibular nasal, pharyngeal), sensory from small areas of skin of earlobe and ear, sensory from blood vessesl, glands, receptors in nose, palate, ORAL CAVITY, taste from anterio   Motor- branchial & visceral, Sensory- somatic, visceral and special  
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VIII   Vestibulochochlear   Inner ear hearing and equilibrium apparatus   pons   Sense of balance and hearing, sensory receptors in inner ear   Special Sensory  
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IX   Glossopharyngeal   Medulla   Throat   Motor to stylopharyngeus, parotid gland, sensory from small area of eardrum, auditory meatus, pinna of ear, Sensory from receptors in ear, pharynx, carotid body, Taste from posterior 1/3 of tongue, Swallowing, salivary gland secretion, taste   Motor- branchial, visceral, Sensory- special, somatic, visceral  
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X   Vagus   Medulla   Thorax and Abdomen   Motor to soft palate, pharynx, larynx, Motor to GI, thorax, abdomen, Sensory from ear drum, external auditory meatus, pinna of ear, Sensory from general visceral organs, taste from epiglottis   Motor- branchial, visceral, Sensory- special, somatic, visceral  
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XI   Accessory   Medulla & Superior aspect of spinal cord   Muscles of neck and back   Motor to muscles of the larynx, pharynx, sternocleidomastoid, and trapezius   Branchial Motor- motor to trapezius, sternomastoid, muscles of the larynx  
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XII   Hypoglossal   Medulla   Tongue   Motor to move the tongue   Somatic Motor- to all intrinsic and majority of the extrinsic muscles of the tongue  
🗑


   

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Created by: PRO Teacher JohnW
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