If the left corticospinal tract is severed in the neck near the first cervical vertebra,
A. muscles in the right arm and leg are paralyzed.
B. muscles in the left arm and leg are paralyzed.
C. pain impulses from the right side are blocked.
D. pain impulses from the left side are blocked.
E. none of the above.
Answer: B. muscles in the left arm and leg are paralyzed.
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