what type of signal travels through the anterior gray horn? motor or sensory? |
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motor |
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what type of signal passes through the posterior gray horn? motor or sensory? |
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sensory |
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what type of signal passes through the ascending spiral tracts? |
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sensory |
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what type of signal passes through the descending spiral tracts? |
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motor |
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what major nerves arise from the cervical plexuses? |
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phrenic nerve |
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what major nerves arise from the brachial plexuses? |
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musculocutaneous, axillary, radial, median, ulnar |
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what major nerves arise from the lumbar plexuses? |
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femoral and orburator nerves |
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what major nerves arise from the sacral plexuses? |
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sciatic nerve |
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IN function, how does the posterior spinal root differ from the anterior spinal root? |
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posterior spinal root carries sensory implulses to the spinal cord and the anterior spinal root carries motor impulses from the spinal cord |
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what causes the cervical enlargement of the spinal cord? |
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due to increased neural information coming from and going to the upper extremities |
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where is the filum terminale found? |
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found attaching the inferior portion of the spinal cord to the coccyx |
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what is the conus medullaris? |
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the terminal portion of the solid part of the spinal cord. Found at about the level of L1 or L2 |
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what is the cauda equina? |
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a structure that is composed of parallel fibers that continue from the conus medullaris into the spinal cord |
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What is the endoneurium? |
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the connective tissue sheath that wraps around the individual nerve fiber |
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In the spinal cord, which is deep to the other, the white matter or the gray matter? |
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gray matter is deep to the white matter |
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What is the area of gray matter that is found between the lateral halves of the spinal cord? |
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central commissure |
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The subarachnoid space is filled with what fluid? |
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cerebralspinal fluid |
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