Question: How would you explain the following observations? a. When motor nerve fibers in the leg are severed, the muscles they innervate become paralyzed; however, in

How would you explain the following observations?

a. When motor nerve fibers in the leg are severed, the muscles they innervate become paralyzed; however, in time, control over the muscles often returns.

b. When motor nerve fibers in the spinal cord are severed, the muscles they control become permanently paralyzed.

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