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15 Cards in this Set
- Front
- Back
Sulcus limitans
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junciton between dorsal and ventral neural tube
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alar plate
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dorsal neural tube, becomes dorsal horn (sensory)
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basal plate
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ventral neural tube, becomes ventral horn (motor)
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roof plate
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dorsal midline thinning of neural tube.
forms choroid plexus of medulla never invaded by neural elements |
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upper spinal cord
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more white matter than lower levels
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dorsal column (white matter)
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discriminate between touch and pain/temperature
-ascending fibers (sensory) |
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Lissauer's tract (white matter)
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between dorsal and lateral columns
-dorsal root axons |
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lateral column
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ascending and descending fibers
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ventral column
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descending fibers (motor)
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fasciculus proprius
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surrounds gray matter, fibers intrinsic to spinal cord running a few segments up/down
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posteromarginal layer (dorsal horn)
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relay cells for pain/temperature
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substantia gelatinosa (dorsal horn)
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interneurons
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nucleus proprius (dorsal horn)
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spinal reflexes, ascending pathway
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Intermediolateral cell nucleus
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lateral horn w/ sympathetic preganglionic neurons synapsing in sympathetic chain
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Nucleus dorsalis/Clarke's Column (intermediate gray)
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afferent information from muscles/joints, relay to cerebellum
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