Stapes Bone

Stapes Bone


The smallest bone in the human body is the stapes or stirrup bone located in the middle ear. It is approximately 11 inches (.28 cm) long.


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The stapes or stirrup is a bone in the middle ear of humans and other mammals that is involved in the conduction of sound vibrations to the inner ear. The stirrup-shaped small bone is on and transmits these to the oval window, medially. The stapes is the smallest and lightest named bone in the human body and is so-called because of its resemblance to a stirrup (Latin: Stapes).

The stapes is the third bone of the three ossicles in the middle ear. The stapes is a stirrup-shaped bone and the smallest in the human body. It rests on the oval window, to which it is connected by an annular ligament. The stapes are described as having a base, resting on the oval window, as well as a head that articulates with the incus. These are connected by anterior and posterior limbs (Latin: crura). The stapes articulates with the incus through the incudostapedial joint. The stapes is the smallest bone in the human body, and measures roughly 3 x 2.5mm, greater along the head-base span.


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