Stapedius muscle has its nerve supply from:

 # Stapedius muscle has its nerve supply from:

A. Trigeminal nerve

B. Facial nerve

C. Glossopharyngeal nerve

D. Stato-acoustic nerve

The correct answer is: B. Facial nerve

Stapedius muscle along with the tensor tympani are muscles of ossicles of middle ear. Stapedius is supplied by facial nerve, whereas tensor tympani is supplied by mandibular nerve. Stapedius and tensor tympani both act simultaneously to damp down the intensity of high pitched sound waves, thus protecting the internal ear. In paralysis of the muscle even normal sounds appear too loud, which is known as "hyperacusis". 

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