The tragicus, also called the tragus muscle or Valsalva muscle, is an intrinsic muscle of the

outer ear The outer ear, external ear, or auris externa is the external part of the ear, which consists of the auricle (also pinna) and the ear canal. It gathers sound energy and focuses it on the eardrum ( tympanic membrane). Structure Auricle The ...

. It is a short, flattened vertical band on the lateral surface of the tragus. While the muscle modifies the auricular shape only minimally in the majority of individuals, this action could increase the opening of the

external acoustic meatus The ear canal (external acoustic meatus, external auditory meatus, EAM) is a pathway running from the outer ear to the middle ear. The adult human ear canal extends from the auricle to the eardrum and is about in length and in diameter. Str ...

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