<prompt> The stapedius muscle, which moves the stapes ossicle, is innervated byCN VCN XIICN IIICN VII  <response>: 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 