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The extrinsic auricular muscles are the three muscles surrounding the auricula or outer ear: anterior auricular muscle; superior auricular muscle; posterior auricular muscle; The superior muscle is the largest of the three, followed by the posterior and the anterior. In some mammals these muscles can adjust the direction of the pinna.
Bigger (proportional real size) and full redraw (more realistic) of the auricle. Ossicles in white colour. Eardrum with contour. Added 3 labels. Add fundus to the bone and subcutaneous tissues, add superior auricular muscle, add transparency to middle ear, add separation between middle and inner ear, add division to internal auditory canal.
The diagram shows the shape and location of most of these components: antihelix forms a 'Y' shape where the upper parts are: Superior crus (to the left of the fossa triangularis in the diagram) Inferior crus (to the right of the fossa triangularis in the diagram) Antitragus is below the tragus; Aperture is the entrance to the ear canal
Add fundus to the bone and subcutaneous tissues, add superior auricular muscle, add transparency to middle ear, add separation between middle and inner ear, add division to internal auditory canal. 18:47, 6 September 2018: 729 × 530 (120 KB) Jmarchn: Bigger and full redraw (more realistic the pavilion). Ossicles in white colour. Eardrum with ...
adjusted a label: 00:49, 28 February 2021: 512 × 389 (49 KB) Cherkash: added Danish (da) translation (based on the corrupted "Anatomy of the Human Ear Dansk.svg") 22:02, 30 January 2021: 512 × 389 (48 KB) Cherkash: fixed several Spanish terms: 21:32, 10 January 2021: 512 × 389 (48 KB) Cherkash
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The outer ear funnels sound vibrations to the eardrum, increasing the sound pressure in the middle frequency range. The middle-ear ossicles further amplify the vibration pressure roughly 20 times. The base of the stapes couples vibrations into the cochlea via the oval window , which vibrates the perilymph liquid (present throughout the inner ...