What is Cochlea?
The cochlea is a spiral-shaped, bony structure in the inner ear that is responsible for hearing. It is filled with fluid and contains tiny hair cells that vibrate when sound waves hit the eardrum. These vibrations are converted into electrical signals that are sent to the brain, where they are interpreted as sound.
Is Cochlea the Eardrum?
No, the cochlea is not the eardrum. The eardrum is a thin membrane that separates the outer ear from the middle ear. The cochlea is located in the inner ear, behind the eardrum and the ossicles (three small bones that transmit sound from the eardrum to the cochlea).
How Do We Hear With The Cochlea?
When sound waves hit the eardrum, they cause it to vibrate. These vibrations are transmitted to the ossicles, which amplify the sound waves and transmit them to the cochlea. The cochlea contains fluid and tiny hair cells that vibrate when they are hit by the sound waves. These vibrations cause the hair cells to send electrical signals to the brain, which are interpreted as sound.
What Organ is in the Cochlea?
The organ of Corti is located in the cochlea. It is a sensory organ that contains the hair cells that convert sound waves into electrical signals. The organ of Corti is arranged in a spiral pattern, with the hair cells located on a thin membrane called the basilar membrane. The basilar membrane vibrates in response to sound waves, and the hair cells located at different points on the membrane respond to different frequencies of sound.
- The cochlea is divided into three chambers: the scala vestibuli, the scala media, and the scala tympani. The scala vestibuli and the scala tympani are filled with perilymph, a fluid that surrounds the hair cells. The scala media is filled with endolymph, a fluid that is more electrically conductive than perilymph.
- The hair cells in the cochlea are arranged in rows, with each row responding to a different frequency of sound. The hair cells at the base of the cochlea respond to low-frequency sounds, while the hair cells at the apex of the cochlea respond to high-frequency sounds.
- The electrical signals from the hair cells are transmitted to the brain throu