Spinal Nerves

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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 :)