How is sound transmitted as a signal to the brain. Explain this process from the external structure that detects sound, and how and what structures work in transmitting this signal to the brain.

 How is sound transmitted as a signal to the brain. Explain this process from the external structure that detects sound, and how and what structures work in transmitting this signal to the brain.

The pinna, external ear, collects sound waves. This sound energy passes through the external acoustic meatus and causes the tympanic membrane to vibrate. The vibration is transmitted to the inner ear through three ear ossicles (malleus, incus, and stapes) located in the tympanic cavity of the middle ear. The footplate of the stapes fits into the oval window, transmitting vibrations to the cochlea. Waves of fluid within the cochlea cause the microvilli of the hair cells of the organ of Corti to bend and produce nerve impulses that are transmitted by cochlear nerves to the brain for interpretation of sound.



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