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Caudate nucleus and memory for egocentric localization.

D Cook1, R P Kesner

  • 1Department of Psychology, University of Utah, Salt Lake City 84112.

Behavioral and Neural Biology
|May 1, 1988
PubMed
Summary
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The caudate nucleus (CN) is crucial for egocentric spatial memory. Lesions to the CN impaired rats on egocentric tasks but not allocentric tasks, confirming its role in self-referenced spatial processing.

Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Spatial Navigation

Background:

  • The caudate nucleus (CN) is implicated in spatial localization.
  • Emerging evidence suggests the CN's specific role in processing egocentric cues (self-referenced localization).
  • This contrasts with allocentric localization (external cues).

Purpose of the Study:

  • To investigate the caudate nucleus's role in egocentric versus allocentric spatial memory.
  • To determine if CN lesions disrupt egocentric tasks while sparing allocentric tasks.

Main Methods:

  • Two groups of rats were trained on egocentric and allocentric memory tasks.
  • Tasks included adjacent-arm and 8-arm radial maze tasks, and right-left discrimination and place-learning tasks.
  • Bilateral lesions of the caudate nucleus were performed post-training.

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Main Results:

  • CN-lesioned rats showed significant impairment in retaining egocentric spatial memory.
  • CN lesions had minimal or transient effects on allocentric memory task performance.
  • Sham-operated controls exhibited no or transient impairments across tasks.

Conclusions:

  • The caudate nucleus plays a critical role in processing egocentric spatial information.
  • Findings support the CN's modulatory function in self-referenced spatial processing, not external spatial processing.