ampulla of semicircular duct
Quick Summary
The ampulla of the semicircular duct is an expanded end of a semicircular duct within the inner ear. This structure is part of the vestibular system, which is crucial for maintaining balance. Each of the three semicircular canals contains a membranous semicircular duct, and each of these ducts has an ampulla. Inside the ampulla is a sensory organ called the crista, which contains hair cells. These hair cells are topped with hair bundles that project into a gelatinous structure called the cupula. Movement of the endolymph fluid within the ampulla causes the cupula to bend, stimulating the hair cells and sending nerve impulses to the brain, which helps in sensing rotational movement.12
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- movement perceptionVestibular system
…canal has a swelling (ampulla) that contains the cupula, a cluster of sensitive hairs embedded in a jellylike mound. As the head moves in the plane of a given canal, motions of the fluid deflect the cupula to produce nerve impulses. These travel through the brainstem to other brain…
Read More…canal has a swelling (ampulla) that contains the cupula, a cluster of sensitive hairs embedded in a jellylike mound. As the head moves in the plane of a given canal, motions of the fluid deflect the cupula to produce nerve impulses. These travel through the brainstem to other brain…
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human earThe physiology of balance: vestibular function…cupula, as found in the ampullae of the semicircular ducts. The cristae respond to waterborne vibrations and to pressure changes.
Read More…cupula, as found in the ampullae of the semicircular ducts. The cristae respond to waterborne vibrations and to pressure changes.
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