BARREL OF THE EAR Meaning and
Definition
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Barrel of the ear refers to the middle part of the ear, specifically the cavity known as the tympanic cavity or middle ear cavity. It is located between the outer ear, which includes the visible portion called the pinna, and the inner ear.
The barrel of the ear is an air-filled space that is bounded by the eardrum (tympanic membrane) on one side and the bony labyrinth of the inner ear on the other. This cavity is connected to the back of the throat by a canal called the Eustachian tube.
Within the barrel of the ear, there are three small bones known as the ossicles: the malleus (hammer), incus (anvil), and stapes (stirrup). These bones are responsible for transmitting sound vibrations from the eardrum to the inner ear through a chain-like mechanism.
The barrel of the ear also plays a vital role in equalizing air pressure on both sides of the eardrum. This occurs through the opening and closing of the Eustachian tube, which allows air to enter or exit the middle ear, balancing the pressure and preventing discomfort or damage to the eardrum.
In summary, the barrel of the ear is the air-filled space between the eardrum and the inner ear, housing the ossicles and playing a crucial role in hearing and pressure regulation.
