Mechanism of Hearing:

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Mechanism of Hearing:
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Mechanism of Hearing:
The sound waves are collected by the external ear up to some extent. They pass through the external auditory meatus to the tympanic membrane which is caused to vibrate. The vibrations are transmitted across the middle ear by the malleus, incus and to the stapes bones. The latter fits into the fenestra ovalis. The perilymph of the internal ear receives the vibrations through the membrane covering, the fenestra ovalis.

From the perilymph the vibrations are transferred to the scala vestibuli of cochlea and then to scala media through Reissner’s membrane. Thereafter, the movements of endolymph and tectorial membrane stimulate the sensory hairs of the organ of Corti.

The impulses thus received by the hair cells are carried to the brain (temporal lobe of each cerebral hemisphere) through the auditory nerve where the sensation of hearing is felt (recognised).
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