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Related Experiment Video

Updated: Apr 30, 2026

T-maze Forced Alternation and Left-right Discrimination Tasks for Assessing Working and Reference Memory in Mice
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Otoconia-deficient mice show selective spatial deficits.

Ryan M Yoder1, Seth L Kirby

  • 1Department of Psychology, Indiana University-Purdue University Fort Wayne, Fort Wayne, Indiana.

Hippocampus
|May 8, 2014
PubMed
Summary

Otolith organs contribute to spatial memory, but are not essential for all spatial tasks. Otoconia-deficient mice showed deficits in spatial working and reference memory when only external cues were available.

Keywords:
otolith organsradial arm mazespatial memoryspatial orientationvestibular

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Area of Science:

  • Neuroscience
  • Vestibular System Research
  • Spatial Cognition

Background:

  • The vestibular system, including semicircular canals and otolith organs, is crucial for spatial memory.
  • Limited research has distinguished the specific roles of otolith organs versus semicircular canals in spatial memory tasks.

Purpose of the Study:

  • To investigate the otolithic contribution to spatial working and reference memory.
  • To evaluate the impact of otoconia deficiency on spatial memory performance in mice.

Main Methods:

  • Utilized otoconia-deficient tilted mice and control mice.
  • Assessed performance on a radial arm maze with and without intramaze cues.
  • Evaluated performance on a Barnes maze using only extramaze cues.

Main Results:

  • Tilted mice showed normal radial arm maze performance with intramaze cues.
  • Otoconia-deficient mice exhibited increased working and reference memory errors on the radial arm maze with only extramaze cues.
  • Both groups demonstrated similar acquisition and probe trial performance on the Barnes maze, indicating effective use of extramaze cues.

Conclusions:

  • Otolith organ signals play a role in spatial memory.
  • Otolith organs are not indispensable for all spatial memory functions, particularly when extramaze cues are available.
  • Vestibular system's contribution to spatial memory is nuanced and task-dependent.