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INBDE Integrated National Board Dental Exam Prep

Category - INBDE

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What is the major descending pathway extending from the cerebral cortex that affects motor neurons and sensory interneurons in the spinal cord?
  1. Corticospinal tract
  2. Rubrospinal tract
  3. Tectospinal tract
  4. Reticulospinal tract
Explanation
Answer: A - The corticospinal tract is the major descending pathway that originates from the cerebral cortex and affects motor neurons and sensory interneurons in the spinal cord. The neurons arise in the primary motor cortex, as well as the cortical areas of the parietal and temporal lobes.
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