Tensor Tympani Muscle: A (Voluntary) Impedence Modulator In Mammals?
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چکیده
At the present time, the function of the TTM remains unknown. One of the main hypotheses accredited in the literature interprets the TTM, together with the Tensor Veli Palatini (TVP), as part of the same anatomic unit [1]. There is an evident phylogenetic connection with respect to the innervation, irrigation and formation of the structures of the throat and ear, including the Eustachian tube. In particular, the TTM and TVP share the common innervation of the motor branch of the trigeminal mandibular (V3) [2]. Their close anatomical relationship was also proved electromyographically. In fact, the TTM and TVP work simultaneously during swallowing, assisting in ventilation of the Eustachian tube in a manner similar to an air pump. The TTM, during its reciprocal contraction with the TVP muscle, thus produces an internal deflection of the tympanic membrane, which appears to break the mucous membrane seal of the isthmus of the Eustachian tube. This action should help to expel air and ventilate the middle ear [3].
منابع مشابه
Audiometric findings with voluntary tensor tympani contraction
BACKGROUND Tensor tympani contraction may have a "signature" audiogram. This study demonstrates audiometric findings during voluntary tensor tympani contraction. METHODS Five volunteers possessing the ability to voluntarily contract their tensor tympani muscles were identified and enrolled. Tensor tympani contraction was confirmed with characteristic tympanometry findings. Study subjects unde...
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