Crista ampullaris

Crista Ampullaris is a sensory organ within the vestibular system of the inner ear that detects changes in angular acceleration. It is found within the ampulla of each of the three semicircular canals.

Structure

The crista ampullaris consists of a mound of tissue called the ampullary crest, which is covered by hair cells. These hair cells are embedded in a gelatinous structure known as the cupula. When the head moves, the fluid in the semicircular canals moves the cupula, which in turn moves the hair cells. This movement of the hair cells sends signals to the brain about the head's motion.

Function

The crista ampullaris plays a crucial role in maintaining balance and spatial orientation. It detects rotational movements of the head, such as when turning the head from side to side or nodding. The information from the crista ampullaris, along with information from the otolith organs, is used by the brain to understand the body's movement and position in space.

Clinical significance

Damage or disease affecting the crista ampullaris can lead to a range of balance disorders, including vertigo, dizziness, and Meniere's disease. Treatment for these conditions often involves medications, physical therapy, or in severe cases, surgery.

See also

• Vestibular system
• Semicircular canals
• Inner ear
• Balance disorder

References

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