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Related Experiment Videos

Context extinction and associative learning in Lymnaea.

Chloe McComb1, Susan Sangha, Syed Qadry

  • 1Department of Physiology and Biophysics, University of Calgary, 3330 Hospital Drive NW, Calgary, Alberta, Canada T2N 4N1.

Neurobiology of Learning and Memory
|June 20, 2002
PubMed
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Pond snails learned to suppress breathing air in low oxygen, forming long-term memories. This memory could be erased, but only if the snails were in the same environment where they learned the behavior.

Area of Science:

  • Behavioral neuroscience
  • Animal cognition
  • Invertebrate learning

Background:

  • Operant conditioning is a fundamental learning process observed across species.
  • Environmental context plays a crucial role in memory formation and retrieval.
  • The pond snail Lymnaea exhibits complex behaviors, including aerial respiration, which can be modified through learning.

Purpose of the Study:

  • To investigate the conditions under which operant conditioning and long-term memory (LTM) for aerial respiratory behavior can be established and extinguished in the pond snail Lymnaea.
  • To determine the influence of environmental context on the extinction of learned behaviors.

Main Methods:

  • Operant conditioning was used to train Lymnaea snails to inhibit aerial respiration in a hypoxic environment.

Related Experiment Videos

  • Training involved multiple sessions in either a standard or a food-odorant context.
  • Extinction training was conducted in either the same or a different context as the initial training.

    • Main Results:

    • A specific training regimen successfully established LTM for the learned behavior, persisting for at least 5 days.
    • Extinction training erased the learned behavior when conducted in the same context as the initial training.
    • Extinction of the learned behavior did not occur if the extinction training context differed from the associative training context.

    Conclusions:

    • Context-dependent learning is critical for the extinction of associative memories in Lymnaea.
    • Environmental cues associated with training can prevent the erasure of learned behaviors, highlighting the importance of contextual information in memory consolidation and retrieval.