Tectorial membrane

Definition

The tectorial membrane is a gelatinous structure located in the cochlea of the inner ear. It plays a crucial role in the process of hearing by interacting with hair cells to transduce sound vibrations into neural signals.

5 Must Know Facts For Your Next Test

1. The tectorial membrane covers the organ of Corti and makes contact with hair cells' stereocilia.
2. It is primarily composed of collagen and glycoproteins, giving it a gel-like consistency.
3. Movement of the basilar membrane causes displacement of the tectorial membrane, which bends the hair cells' stereocilia.
4. This bending generates electrical signals that are sent to the brain via the auditory nerve.
5. Damage to or dysfunction of the tectorial membrane can result in hearing impairments or loss.

Review Questions

• What is the primary function of the tectorial membrane in hearing?
• How does movement of the basilar membrane affect the tectorial membrane?
• What type of substance primarily composes the tectorial membrane?

Related terms

Cochlea: A spiral-shaped cavity in the inner ear that contains structures essential for hearing.

Hair Cells: Sensory cells within the cochlea that convert mechanical sound vibrations into electrical signals.

Basilar Membrane: A structure within the cochlea that supports hair cells and vibrates in response to sound waves.