4.20 Inner Ear and Hearing Mechanisms

These flashcards cover key concepts related to the inner ear, the functioning of the cochlea, the basilar membrane, and the application of place theory in hearing.

What is the role of the cochlea in hearing?

The cochlea is a snail-shaped structure that helps to process sound by moving fluid in response to vibrations from the stapes.

What is the basilar membrane and its importance in hearing?

The basilar membrane runs along the cochlea and contains hair cells that convert fluid movements into action potentials, playing a crucial role in sound transduction.

What is the place theory of hearing?

The place theory suggests that different frequencies of sound are detected by different locations along the basilar membrane.

How is the basilar membrane organized according to frequency?

The base of the basilar membrane is stiffer and more suited for high frequencies, while the apex is wider and more flexible, better for low frequencies.

Why do low frequencies travel further than high frequencies?

Low frequency sound waves travel further because they are more capable of moving the flexible part of the basilar membrane.

What is the purpose of cochlear implants?

Cochlear implants are devices that provide electrical stimulation to the basilar membrane, substituting for damaged hair cells to help restore hearing.

What can significantly improve language outcomes in children born deaf?

Early implantation of cochlear implants can lead to impressive language skills by enabling them to hear certain frequencies of sound.