Spinal Nerves
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Last updated 10:42 PM on 9/1/25
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4 Terms
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Nerve
cable like bundle of axons
epineurium (around nerve), perineurium (around fascicle), endoneurium (around axon)
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Nerve plexux
extension of spinal nerves
cervical plexus: C1-C4, C3-C5 = phrenic nerve (diaphragm)
brachial plexus: C5-T1, 5 major terminal branches
axillary, median, musculotendons, radial, ulnar
lumbar plexus: L1-L4
femoral: main posterior nerve
obturator: main anterior nerve
sacral plexus: L4-S4
sciatic: longest nerve in body
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Dermatomes
segments of skin supplied by 1 nerve
helps localize damage
referred visceral pain
shingles: root ganglia
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Woohoo
all done :)
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