stapedius muscle

(redirected from musculus stapedius)
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sta·pe·di·us mus·cle

(stā-pē'dē-ŭs mŭs'ĕl)
Origin, internal walls of pyramidal eminence in tympanic cavity; insertion, neck of the stapes; action, dampens vibration of stapes by drawing head of stapes backward as a result of a protective reflex stimulated by loud noise; nerve supply, facial.
Synonym(s): musculus stapedius [TA] .

stapedius muscle

Middle ear muscle. Origin: posterior wall of middle ear. Insertion: neck of stapes. Nerve: facial (CN VII). Action: tilts stapes, dampens excessive vibrations.
See also: muscle


innermost auditory ossicle; shaped like a stirrup.

stapedius muscle
a striated muscle which aids in the dampening of the effects of high-frequency vibrations on the auditory apparatus.
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