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Assessment of Social Transmission of Food Preferences Behaviors
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Hippocampal lesions interfere with long-trace taste aversion conditioning.

Ming Teng Koh1, Daniel S Wheeler, Michela Gallagher

  • 1Department of Psychological and Brain Sciences, Johns Hopkins University, Baltimore, MD 21218, United States. mtkoh@jhu.edu

Physiology & Behavior
|April 28, 2009
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Summary

Lesions to the hippocampus impaired long-interval taste aversion learning. Dorsal and ventral hippocampal functions were dissociated in trace fear and water maze tasks, suggesting a less differentiated role in long-trace aversion learning.

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Area of Science:

  • Neuroscience
  • Behavioral Neuroscience
  • Cognitive Neuroscience

Background:

  • The hippocampus plays a crucial role in learning and memory.
  • Dorsal and ventral regions of the hippocampus are known to have distinct functions.

Purpose of the Study:

  • To investigate the effects of dorsal and ventral hippocampal lesions on taste aversion learning.
  • To examine the role of the hippocampus in trace fear conditioning and spatial memory.

Main Methods:

  • The study involved creating lesions in the dorsal and ventral hippocampus of subjects.
  • Taste aversion learning was assessed using standard and long intervals between taste exposure and illness induction.
  • Trace fear conditioning and water maze performance were also evaluated.

Main Results:

  • Hippocampal lesions did not impair taste aversion acquisition with standard intervals but did impair it with long intervals (3 hours).
  • Ventral hippocampal lesions selectively impaired trace fear conditioning.
  • Dorsal hippocampal lesions selectively impaired water maze performance.

Conclusions:

  • The findings suggest that the hippocampus plays a role in taste aversion learning, particularly when a long interval is involved.
  • The results support the dissociation of dorsal and ventral hippocampal functions in different learning tasks.
  • The hippocampus may have a less differentiated role in long-trace taste aversion learning compared to other hippocampal-dependent tasks.