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Question
Regarding the neurologic basis of unilateral upper motor neuron dysarthria, which of the following is TRUE?
A. Damage occurs to upper motor neurons on one side of the brain.
B. It can occur only after damage to the left hemisphere.
C. Most of the cranial nerves serving speech muscles receive unilateral innervation from the upper motor neurons.
D. Most of the cranial nerves serving speech muscles receive bilateral innervation from the lower motor neurons.
Answer
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