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| py·ram·i·dal tract (plural py·ram·i·dal tracts) |
noun |
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| Definition: |
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nerve bundle in brain: either of two bundles of nerve fibers, shaped like inverted pyramids, running from each hemisphere of the cerebral cortex down the spinal cord to all voluntary muscles of the body. In the brain, they are susceptible to stroke damage that can lead to inability to move one side of the body.
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