What is the smallest bone in the body?

1 The smallest bone in the human body

2 Discover the stirrup bone

3 The role of the stapes bone in hearing

The smallest bone in the human body

The middle ear of a person contains the three ossicles of hearing. It is the anvil, the hammer, the stirrup, and the stirrup bone is the smallest of the three bones and the smallest bone in the human body, as the stirrup bone contributes to the transmission of sound vibrations from the anvil bone that it is attached to to the Ovid window that connects the middle ear to the vestibule of the bone labyrinth in the inner ear.

Discover the stapes bone

The Italian doctor Giovanni Filippo Ingracia discovered the stapes bone by chance in 1546 AD, when he was dissecting the ear to explain to his students its cavities and the materials inside it, and when he separated the hearing bones known at the time, namely the hammer and the anvil, he discovered the existence of a third small bone associated with the anvil, and he later confirmed its existence In many animals, including cows, before returning to dissect a human head to search for it, it was found that the stirrup bone is connected to one of the two protrusions of the anvil bone, which is the longest and thinner protrusion, and due to the similarity of the shape of this bone to the stirrups of the horse’s saddle, the doctor called it the stirrup.

The role of the stapes bone in hearing

The stapes bone resembles a tuning fork, as it consists of a flat base that branches off into two branches known as the inferior crus and the superior peduncle (in English: superior crus), and the stirrup bone has an important role in enabling a person to hear Sounds;

The sound waves pass through the auditory canal to the eardrum and then to the middle ear, so the hammer bone vibrates (in English: Malleus) and the vibrations from it are transmitted to the anvil bone (in English: Incus) and then to the stirrups (in English: Stapes). To the flat stirrup base and from there to the inner ear, where the sound vibrations are transformed into nerve data that are transmitted to the brain through the cochlea and the auditory nerve. The inability of the vibrations to complete their way into the inner ear.




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