If the lower motor neurons to a muscle are destroyed, which of the following signs affects the denervated muscles?
A. Loss of reflexes
B. Atrophy
C. Muscle hyperstiffness
D. Both A and B
E. A, B, and C
ANS: D
Rationale: Denervated muscles atrophy and lose reflexes because there is no efferent pathway from the spinal cord to the muscles. Spasticity cannot occur because spasticity is neuromuscular overactivity, and there are no signals from the nervous system to the muscles.
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