What is the smallest muscle in the human body.

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Michael Ugulini eNotes educator| Certified Educator

The smallest muscle found in the human body is the stapedius muscle. This muscle is the smallest striped muscle of the human body. The stapedius muscle undergoes reflexive contraction in response to acoustic stimulation. It reacts to loud sounds.

Stapes is the smallest of the three ossicles of the ear. The other two ossicles are the Incus and the Malleus. The harmonized movement of these three ossicles allows for the amplification of sound.

In fact, the Stapes is the smallest bone in one's body. The stapedius, that smallest muscle, is attached at the the neck of this very small Stapes. This muscle is a part of the ear's protective mechanisms. The ears contain physical configurations for the sense of hearing as well as the sense of balance.
A type of hearing loss called "Conductive Hearing Loss"occurs when there is blocking of sound vibrations from the tympanic membrane to the inner ear. Typical causes of this condition are ear wax in the auditory canal, the build up of fluid in the middle ear, and ear infections or unusual bone growth.

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