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Unformatted text preview: brain Collection of neurons Nucleus Ganglion Collection of axons running together Tract Nerve White matter Contains mylenated axons Gray matter Core, many nerve cell bodies Dorsal root Bundles of sensory axons, bring info to spinal cord Dorsal root ganglion Bulge, unipolar nerve cell bodies Ventral root Bundles of axons that are leaving Spinal nerve (31 pairs) Mixture of incoming sensory and outgoing motor processes Dorsal ramus Supplies muscles of trunk Ventral ramus Supplies PNS muscles of lower extremity Thoraci c Lumbar Sacral T12 L1 L2 L3 L4 L5 S1 S2 S3 S4 S5 Lumbar Plexus (T12-L4) Obturator&Femoral N. (L2-L4) Sacral Plexus (L4-S4) Sciatic N. : Tibial N. (L4-S3) Common Paroneal N. (L4-S2) Superior Gluteal N. (L4-S1) Inferior Gluteal N. (L5-S2) Ligaments in Vertebral Column:...
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