| 1. | Pyramidal neurons are the primary neural cell type in the corticospinal tract.
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| 2. | The corticospinal tract conducts impulses from the brain to the spinal cord.
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| 3. | It is hypothesized that it uses both the corticospinal tract and rubrospinal tract.
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| 4. | The corticospinal tracts myelinate largely during the first and second years after birth.
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| 5. | Atrophy of Betz cells and corticospinal tracts constitute a second lesion.
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| 6. | The corticospinal tracts are on the anterior surface of the pyramids.
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| 7. | The Betz cells account for only a small percentage of the corticospinal tract.
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| 8. | Abnormal activation of TBR1 in layer V eliminates corticospinal tract formation.
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| 9. | The other 10 % of the fibers stay uncrossed in the anterior corticospinal tract.
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| 10. | The " pyramidal tracts " definitively encompass the corticospinal tracts.
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