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23 Cards in this Set
- Front
- Back
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Spinal Cord Parts |
medullary cone terminal filum cauda equina cervical enlargement lumbar enlargement gray matter white matter gray commissure
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medullary cone |
lower end of the spinal cord |
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terminal filum |
an extension of the pia mater |
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cauda equina |
downward extension of several lower spinal nerves |
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cervical enlargement |
slight bulge in cervical region of spinal cord |
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lumbar enlargement |
slight bulge in lumbar region of spinal cord
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gray matter |
center region of spinal cord (shaped like a butterfly)
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white matter |
located surrounding the gray matter of spinal cord |
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gray commissure |
crossbar region of the “butterfly” in spinal cord |
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ascending tracts |
bundles of axons in spinal cord that carry sensory input upward
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descending tracts |
bundles of axons in spinal cord that carry motor output downward
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Spinal Nerve facts |
-31 pairs |
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plexus |
network of branched nerves that originate as spinal nerves |
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main plexuses |
cervical, brachial, lumbar, sacral
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In cervical plexus |
phrenic nerve: to diaphragm; controls breathing |
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In brachial plexus |
-radial nerve
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radial nerve |
-runs length of arm; on thumb side in forearm |
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median nerve |
-runs length of arm; near middle in forearm |
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ulnar nerve |
-runs length of arm; little finger side in forearm |
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musculocutaneous nerve |
controls several arm muscles |
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axillary nerve |
controls shoulder |
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In lumbar plexus |
-femoral nerve |
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In sacral plexus |
-sciatic nerve |
