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Related Experiment Videos

Motor abnormalities in lurcher mutant mice.

R Lalonde1, M I Botez, C C Joyal

  • 1Hotel-Dieu Hospital, Neurology Service, Montreal, Canada.

Physiology & Behavior
|March 1, 1992
PubMed
Summary

Lurcher mutants show motor deficits in some tests but not others, indicating preserved function despite cerebellar degeneration. These findings highlight nuanced motor impairments in ataxia models.

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Area of Science:

  • Neuroscience
  • Genetics
  • Behavioral Science

Background:

  • Cerebellar degeneration leads to ataxia and motor deficits.
  • Lurcher mutants are a genetic model exhibiting cerebellar abnormalities.

Purpose of the Study:

  • To assess motor function in Lurcher mutants using various behavioral tests.
  • To investigate the extent of motor impairment in the context of cerebellar degeneration.

Main Methods:

  • Lurcher mutants were evaluated using coat-hanger, grid, and wooden beam tests.
  • Hole-poke tests were employed to assess exploratory and perseverative behaviors.
  • Rearing responses were quantified to measure general activity levels.

Main Results:

  • Mutants displayed equilibrium deficits in coat-hanger and grid tests, but not the wooden beam test.
  • Perseverative behavior was observed, with more hole-pokes in larger holes.
  • No significant decrease in rearing responses was noted.

Conclusions:

  • Lurcher mutants exhibit selective motor impairments, not a global deficit.
  • Despite cerebellar degeneration and ataxia, some motor functions remain intact.
  • Behavioral testing reveals complex motor control patterns in this ataxia model.

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