Answer :
Final answer:
Loss of muscular action in the muscles of facial expression indeed leads to paralysis of facial muscles. This paralysis, also known as flaccid paralysis, is caused by a lesion on the lower motor neuron which affects muscular control.
Explanation:
The loss of muscular action of the muscles of facial expression can lead to paralysis of facial muscles, known as flaccid paralysis, a term referring to complete or partial loss of muscle tone. This is due to a lesion on the lower motor neuron (LMN), which interrupts voluntary muscle control. Muscles of facial expression, such as those surrounding the eyelids, nose, and mouth, normally produce facial expressions by moving the skin rather than bones.
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