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  • vestibule
  • The utricle and the saccule are parts of the balancing apparatus (membranous labyrinth) located within the vestibule of the bony labyrinth (small oval chamber). (wikipedia.org)
  • The utricle is larger than the saccule and is of an oblong form, compressed transversely, and occupies the upper and back part of the vestibule, lying in contact with the recessus ellipticus and the part below it. (wikipedia.org)
  • stereocilia
  • in the saccule they are oriented away from the striola The tips of the stereocilia and kinocilium are embedded in a gelatinous otolithic membrane. (wikipedia.org)
  • The utricle contains mechanoreceptors called hair cells that distinguish between degrees of tilting of the head, thanks to their apical stereocilia set-up. (wikipedia.org)
  • ampullae
  • At the base of each canal, the bony region of the canal is enlarged which opens into the utricle and has a dilated sac at one end called the osseous ampullae. (wikipedia.org)
  • sensitivity
  • Research has shown, like songbirds, females in some species of fish show seasonal variation in auditory processing and the sensitivity of the saccule of females peaks during the breeding season. (wikipedia.org)
  • plane
  • The horizontal plane is defined by Reid's line, the line connecting the lower rim of the orbita and the center of the external auditory canal. (wikibooks.org)
  • The utricle is responsible for sensing horizontal movement (i.e. forward-backward and left-right movement), while the saccule serves to detect movement in the sagittal plane (i.e. up-down movement). (physio-pedia.com)
  • opens
  • From the lower part of the saccule a short tube, the canalis reuniens of Hensen, passes downward and opens into the ductus cochlearis near its vestibular extremity. (wikipedia.org)
  • head
  • The animals were rotated in darkness at 60°/s about an earth horizontal axis while placed in a pitched position relative to the rotation axis, so that the plane in which the gravitational vector rotated around the head was varied while the acceleration applied along the inter-aural axis remained identical across different pitch conditions. (nii.ac.jp)
  • Movement of fluid within the horizontal semicircular canal corresponds to rotation of the head around a vertical axis (i.e. the neck), as when doing a pirouette. (wikipedia.org)
  • This push-pull system makes it possible to sense all directions of rotation: while the right horizontal canal gets stimulated during head rotations to the right (Fig 2), the left horizontal canal gets stimulated (and thus predominantly signals) by head rotations to the left. (wikipedia.org)
  • The utricle contains mechanoreceptors called hair cells that distinguish between degrees of tilting of the head, thanks to their apical stereocilia set-up. (wikipedia.org)
  • Any orientation of the head causes a combination of stimulation to the utricles and saccules of the two ears. (wikipedia.org)
  • The saccule translates head movements into neural impulses which the brain can interpret. (wikipedia.org)
  • The saccule, like the utricle, provides information to the brain about head position when it is not moving. (wikipedia.org)
  • The semicircular canals (brown, see figure) are arranged at angles to the horizontal plane of the head when it is in its normal vertical posture. (wikipedia.org)
  • The saccule and utricle detect different motions, which information the brain receives and integrates to determine where the head is and how and where it is moving. (wikipedia.org)
  • Because of their orientation in the head, the utricle is sensitive to a change in horizontal movement, and the saccule gives information about vertical acceleration (such as when in an elevator). (wikipedia.org)
  • utricular
  • The amplitude of the compensatory bias slow phase eye velocity was the largest when the gravitational vector rotated in a plane between the animals' stereotaxic horizontal and presumed utricular planes. (nii.ac.jp)
  • The phase of the modulation in yaw (horizontal) slow phase velocity, but not in eye position, tended to lag as the stimulus axis deviated from the normal to the presumed utricular plane. (nii.ac.jp)
  • balance
  • We examined Hcn mRNA expression and immunolocalization of HCN protein in the mouse utricle, a mechanosensitive organ that contributes to the sense of balance. (jneurosci.org)
  • This overview also explains acceleration as its processes are interconnected with balance. (wikipedia.org)
  • position
  • The modulation of roll (torsional) eye position was a function of the interaural acceleration, but the amplitude of modulation of roll slow phase velocity decreased with an increase in the roll bias velocity. (nii.ac.jp)