12_PNS and ANS

12_PNS and ANS - PNS AND ANS& 18 12 Pairs of Cranial...

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Unformatted text preview: PNS AND ANS Chapters 15, 16 & 18 12 Pairs of Cranial Nerves (Use Table 15.7 in your textbook to fill in the blanks) Cranial Nerve Sensory Functions Motor Functions Olfactory (I) Smell Optic (II) Sight Oculomotor (III) Ciliary muscle, pupil constriction, extrinsic eye muscles (not superior oblique or lateral rectus) Trochlear (IV) Superior oblique Trigeminal (V) Face, teeth, tongue Mastication Abducens (VI) Lateral rectus Facial (VII) Taste (anterior 2/3 of tongue) Facial muscles, saliva, tears Vestibulocochlear (VIII) Hearing, balance Glossopharyngeal (IX) Taste (posterior 1/3 of tongue) Swallowing and saliva Vagus (X) 70% of parasympathetic 70% of parasympathetic Accessory (XI) Sternocleidomastiod, trapezius Neuron Pathways and Spinal Nerves • 31 pairs of spinal nerves – Made of sensory afferent and motor efferent neurons – Sensory afferent neurons enter the dorsal spinal cord – Motor efferent neurons exit the ventral spinal cord Dermatomes • A specific segment of skin supplied by a single spinal nerve • This segmentation pattern of spinal nerves is caused by embryonic somites • All spinal nerves except for C1 innervate a segment of skin, and each of these nerves is associated with a dermatome • Involved in referred visceral pain • An inflamed appendix may cause pain in the T10 dermatome Shingles...
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This note was uploaded on 04/06/2011 for the course PDBIO 220 taught by Professor Tomco during the Winter '09 term at BYU.

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12_PNS and ANS - PNS AND ANS& 18 12 Pairs of Cranial...

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