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18 Cards in this Set
- Front
- Back
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What 2 important functions does the spinal cord serve?
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Pathway for sensory and motor impulses, and the spinal cord and spinal nerves are responsible for reflexes, which are our quickest reactions to stimulus.
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What are the 5 subdivisions of the spinal cord?
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Cervical, thoracic, lumbar, sacral, and cocccygeal region
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What region of the spinal cord is continuous with the medulla oblongata?
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Cervical region
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What region contains the motor neurons for the thoracic spinal nerves?
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Thoracic region
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What vertebrae is the lumbar region of the spinal cord closer to?
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Inferior or lower thoracic vertebrae
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What region of the spinal cord has only one pair of spinal nerves?
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Coccygeal region
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What is the tapering end of the spinal cord called?
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Conus medullaris
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What marks the official end of the spinal cord proper?
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Conus medullaris
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Where does the spinal cord proper usually end?
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First Lumbar vertebrae
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What is the cauda equina?
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Inferior to the conus medullaris, it is a group of axons.
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What is within the cauda equina which is a thin strand of pia mater that helps anchor the conus medullaris to the coccyx?
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Filum terminale
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Why does the spinal cord end at L1 in an adult and L2 in a child?
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Has to do with the rate of growth the spinal column grows faster than the spinal cord
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The diameter of the spinal cord changes along its entire length, why?
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Because the amount of gray matter and white matter and the function of the cord vary in different regions.
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Where is the spinal cord largest?
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Cervical enlargement: Upper and lower limbs because more neuron cell bodies are located there, and more space is occupied by the axons and dendrites.
Lumbosacral enlargement: extends through the mid-lumbar region of the spinal cord and innvervates the lower limbs |
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How many pairs of spinal nerves are there?
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31
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How are spinal nerves named?
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Named after the thoracic vertebrae it passes underneath
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How many pairs of cervical spinal nerves are there? How many cervical vertebrae are there? Why?
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8, 7 (the first pair of cervical vertebrae emerges between the atlas (the 1st cervical vertebrae) and the occipital bone
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Name all the spinal nerves
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8 cervical
12 thoracic 5 lumbar 5 sacral 1 coccygeal |
