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12 Cards in this Set
- Front
- Back
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spinal cord
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continuation of the brain stem
tube-like structure located in the spinal cavity extends from the foramen magnum to the fiest lumbar vertebra |
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gray matter
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located in the center and is shaped like a butterfly
composed of cell bodies, interneurons 2 projections, the dorsal horn and ventral horn |
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white matter
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spinal cord is primarily myelinated axons
neuronal axons grouped together into nerve tracts |
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ascending tracts
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sensory tracts carry info from the periphery, up in the spinal cord, toward the brain
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motor tracts(descending tracts)
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carry info from the brain to the spinal cord, to the periphery
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pyramidal tract (corticospinal)
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major motor tract
originates from the frontal lobe info carried fron the cortical region to the spinal cord |
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dorsal root
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sensory nerve fibers from the periphery travel to the cord
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ventral root
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motor fibers
distributed to muscles and glands |
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reflex
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involuntary response to a stimulus
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pupillary reflex
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regulates the amount of light that enters the eye
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baroreceptor reflex
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restores boold pressure and vessel to return to normal
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Babinski reflex
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stroking plantar causing flexion of the toes
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