crista ampullaris
Quick Summary
The crista ampullaris is a sensory structure located within the ampullae of the semicircular canals in the inner ear. These semicircular canals are part of the vestibular system, which is responsible for maintaining balance and coordinating head and eye movements.123
The crista ampullaris contains neuroepithelium, composed of supporting cells and sensory hair cells. These hair cells have hairlike cilia that project from their apical ends. A gelatinous structure called the cupula extends from the crista and divides the ampulla. When the head rotates, the inertia of the fluid within the semicircular canals causes the cupula to deflect, stimulating the hair cells. This stimulation sends nerve impulses to the brainstem, providing information about rotational movements.124
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human earSemicircular canals…ridge of tissue called the crista, the sensory end organ that extends across it from side to side. The crista is covered by neuroepithelium, with hair cells and supporting cells. From this ridge rises a gelatinous structure, the cupula, which extends to the roof of the ampulla immediately above it,…
Read More…ridge of tissue called the crista, the sensory end organ that extends across it from side to side. The crista is covered by neuroepithelium, with hair cells and supporting cells. From this ridge rises a gelatinous structure, the cupula, which extends to the roof of the ampulla immediately above it,…
Read More- vestibular systemSemicircular canals
…ridge of tissue called the crista, the sensory end organ that extends across it from side to side. The crista is covered by neuroepithelium, with hair cells and supporting cells. From this ridge rises a gelatinous structure, the cupula, which divides the interior of the ampulla into two approximately equal…
Read More…ridge of tissue called the crista, the sensory end organ that extends across it from side to side. The crista is covered by neuroepithelium, with hair cells and supporting cells. From this ridge rises a gelatinous structure, the cupula, which divides the interior of the ampulla into two approximately equal…
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mechanoreceptionRotation receptors…row on a ridge (crista) of the ampullar wall. The crista is oriented at right angles to the plane of the canal, and the extended hairs of its sensory cells are imbedded in a jellylike cupula that reaches to the opposite wall of the ampulla. Endolymph displacement through a…
Read More…row on a ridge (crista) of the ampullar wall. The crista is oriented at right angles to the plane of the canal, and the extended hairs of its sensory cells are imbedded in a jellylike cupula that reaches to the opposite wall of the ampulla. Endolymph displacement through a…
Read More- human earThe physiology of balance: vestibular function
Each organ contains a crista, sensory hair cells, and a cupula, as found in the ampullae of the semicircular ducts. The cristae respond to waterborne vibrations and to pressure changes.
Read MoreEach organ contains a crista, sensory hair cells, and a cupula, as found in the ampullae of the semicircular ducts. The cristae respond to waterborne vibrations and to pressure changes.
Read More - human earDetection of angular acceleration: dynamic equilibrium
…arising from one of the ampullar cristae. When the labyrinth was at rest there was a slow, continuous, spontaneous discharge of nerve impulses, which was increased by rotation in one direction and decreased by rotation in the other. In other words, the level of excitation rose or fell depending on…
Read More…arising from one of the ampullar cristae. When the labyrinth was at rest there was a slow, continuous, spontaneous discharge of nerve impulses, which was increased by rotation in one direction and decreased by rotation in the other. In other words, the level of excitation rose or fell depending on…
Read More
