• cochlea
  • p75NTR immunostaining was most prominent in the nerve fibers that penetrate into the sensory epithelia of the cochlea, the urticule and the saccule as gestational age progresses. (springer.com)
  • hair
  • 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)
  • Each utricle has about 30'000 hair cells, and each saccule about 16'000. (wikibooks.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)
  • vertical
  • the saccule (center) lies approximately vertical. (wikibooks.org)
  • It primarily gathers information about linear movement in the vertical plane, including the force due to gravity. (wikipedia.org)
  • Movement of fluid within this canal corresponds to rotation of the head around a vertical axis (i.e. the neck), or in other words rotation in the transverse plane. (wikipedia.org)
  • Constant velocity vertical on-axis rotation leads to decay of the nystagmus response from the horizontal SCC and of perceived angular velocity (PAV), and when the rotation stops, a similar oppositely directed post-rotatory response occurs. (readbyqxmd.com)
  • head
  • 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)
  • 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)
  • 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)
  • 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)
  • rotation
  • Any rotation in that plane is excitatory to one of the members of the pair and inhibitory to the other. (medscape.com)
  • motion
  • Each canal is maximally responsive to angular motion in the plane in which it is situated and is paired with a canal on the contralateral side so that stimuli that are excitatory to one are inhibitory to the other. (medscape.com)
  • In fact, most vestibular functions are imperceptible, but vestibular-related sensations such as motion sickness can pop up rapidly when riding on a roller coaster, having a bumpy plane ride, or a sailing a boat in rough seas. (nobaproject.com)