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What is The stapedius muscle, which moves the stapes ossicle, is innervated by and explain in detail?
Stapedius muscle - derivative of 2nd phyrangel arch Supplied by Fcaial nerve (nerve to stapedius) which is also 2nd phyrangeal arch derivative Aery of 2nd phyrageal arch - stapedial aery Origin of stapedius- from pyramidal eminence and inseed into neck of stapes. Function- stapedial Reflex / Acoustic reflex- when loud sounds (above 90 db ) are perceived -stapedial muscle contracts -stapes pulled back