Labyrinth

Definition

The labyrinth is a complex system within the inner ear involved in hearing and balance. It consists of both the bony labyrinth and membranous labyrinth, including structures like the cochlea, vestibule, and semicircular canals.

5 Must Know Facts For Your Next Test

1. The bony labyrinth is filled with perilymph fluid while the membranous labyrinth contains endolymph fluid.
2. The cochlea within the labyrinth is responsible for converting sound vibrations into neural signals.
3. Semicircular canals are part of the labyrinth that detect rotational movements of the head.
4. The vestibule houses the utricle and saccule which are essential for detecting linear acceleration and head position relative to gravity.
5. Damage to the labyrinth can result in vertigo, hearing loss, or balance disorders.

Review Questions

• What types of fluid are found in the bony and membranous parts of the labyrinth?
• Which part of the labyrinth is primarily responsible for hearing?
• How do semicircular canals contribute to our sense of balance?

Related terms

Cochlea: A spiral-shaped cavity within the inner ear that converts sound vibrations into electrical signals sent to the brain.

Vestibule: Central part of the bony labyrinth containing structures essential for balance, such as the utricle and saccule.

SemicircularCanals: Three looped tubes in each ear that detect rotational movements and help maintain balance.