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incudomalleolar joint
Incudomalleolar joint or articulatio incudomallearis is a small synovial joint between the malleus (hammer) and the incus (anvil). The joint's function is to transfer vibrations between the ossicles in the middle ear, which is perceived as sound. Contrary to other synovial joints the moment is very limited and is usually only of springy character. All of the ossicles move as a unit.
When the eardrum is moved inward due to sound vibrations, transferred through the outer ear, it transmits to the handle or manubrium of the malleus which is connected to the ear drum. The head of the malleus (caput mallei) moves with it and transfers energy/movement to the corpus of the incus (corpus incudis), which is located directly behind. The sound vibrations is then transferred to the stapes (stirrup) through the incudostapedial joint. When the ear drum moves inwards so does all of the ossicles and the oval window.
==See also==
Incudostapedial joint
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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