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Related Experiment Videos

Impaired spatial working and reference memory in segmental trisomy (Ts65Dn) mice

G E Demas1, R J Nelson, B K Krueger

  • 1Department of Psychology, The Johns Hopkins University, Baltimore, MD 21218, USA. demas@ren.psy.jhu.edu

Behavioural Brain Research
|April 1, 1998
PubMed
Summary

The Ts65Dn mouse model of Down Syndrome (DS) exhibits significant spatial memory deficits. These mice show impaired working and reference memory, highlighting cognitive dysfunction in DS models.

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Area of Science:

  • Neuroscience
  • Genetics
  • Cognitive Science

Background:

  • Down Syndrome (DS) is associated with cognitive impairments.
  • The Ts65Dn mouse is a genetic model used to study DS.
  • Understanding cognitive deficits in DS models is crucial for therapeutic development.

Purpose of the Study:

  • To investigate the spatial working and reference memory capabilities of the Ts65Dn mouse model.
  • To characterize the cognitive phenotype of Ts65Dn mice in comparison to control littermates.

Main Methods:

  • Utilized the 12-arm radial maze (RAM) task to assess memory functions.
  • Compared the performance of Ts65Dn mice and control mice on spatial working and reference memory tasks.

Main Results:

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  • Ts65Dn mice committed significantly more reference memory errors than control mice.
  • Ts65Dn mice demonstrated impaired spatial working memory, performing at chance levels without improvement.
  • Both genotypes showed learning across trials, but Ts65Dn mice exhibited slower improvement.

Conclusions:

  • The Ts65Dn mouse model displays notable deficits in both spatial working and reference memory.
  • These findings support the Ts65Dn mouse as a relevant model for studying cognitive dysfunction in Down Syndrome.