V - a nervous supply to entire arm and shoulder The Brachial Plexus Roots Trunks Divisions Cords Nerve muscles E.g C5-T1 Superior trunk Inferior

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V. The Spinal Nerves A. Named - according to vertebral level (as above) B. Coverings 1. endoneurium - around individual axon (myel. or not) 2. perineurium - around axon bundles (fascicles) 3. epineurium - around the entire nerve 4. meninges of cord fuse with epineurium on exit C. Branches of a Spinal Nerve 1. dorsal ramus - deep muscles and skin of back 2. ventral ramus - extremities, ventrolateral trunk 3. meningeal branch - back into the spinal column 4. rami communicantes - for autonomic nerve fibers D. The Four Nerve Plexuses 1. cervical plexus - ventral rami of C1-C4 with some C5 a. muscles/skin of head, neck, some shoulder b. phrenic nerve - diaphragm muscle (breathing) 2. brachial plexus - ventral rami of C5-C8 and T1
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Unformatted text preview: a. nervous supply to entire arm and shoulder The Brachial Plexus Roots Trunks Divisions Cords Nerve muscles E.g. C5-T1 Superior trunk, Inferior trunk Anterior division lateral cord, medial cord median nerve flexors of forearm 3. lumbar plexus- ventral rami of L1-L4 a. abdominal wall, genitals, part of lower limb b. femoral nerve 4. sacral plexus- ventral rami of L4-L5 and S1-S4 a. buttocks, perineum, part of lower limb b. sciatic nerve - largest nerve of body VI. Dermatomes A. Dermatome - skin innervated by dorsal root of a spinal n. =================================================================...
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This note was uploaded on 01/29/2012 for the course SCIE SYG2000 taught by Professor Bernhardt during the Fall '10 term at Broward College.

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V - a nervous supply to entire arm and shoulder The Brachial Plexus Roots Trunks Divisions Cords Nerve muscles E.g C5-T1 Superior trunk Inferior

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