A child with motor deficits is being prepared for a clinical examination. Her chart reads that she has been diagnosed with Werdnig-Hoffman disease. This is a form of which of the following?
A. Spina bifida
B. Cerebral palsy
C. Spinal muscle atrophy
D. Autism
ANS: C
Rationale: Werdnig-Hoffman disease, also known as type I spinal muscle atrophy, is the most severe form of spinal muscle atrophy. In Werdnig-Hoffman disease, motor neurons with cell bodies in the spinal cord degenerate, producing muscle weakness and atrophy.
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