Both TT and stapedius muscles are involved in the acoustic reflex, which is the involuntary contraction of these muscles following high-intensity sounds and is suspected of protecting the inner ear cells from damage. 6 juin 2022 · Both the stapedius muscle and the TTM are involved in it and have similar fiber compositions; however, each of these muscles has a different role, indicated by their different innervations and specific reflex pathways, as seen in previous studies. The stapedius is the main muscle involved in protecting the ear from external auditory stimuli, as confirmed in the study showing that the MEM.