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Related Concept Videos

Principles of Classical Conditioning01:23

Principles of Classical Conditioning

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Classical conditioning, as described by Ivan Pavlov, is a foundational concept in associative learning, where a neutral stimulus becomes capable of eliciting a conditioned response through association with an unconditioned stimulus. The process of acquisition, where this learning occurs, and the subsequent phenomena of contiguity, contingency, generalization, discrimination, extinction, and spontaneous recovery are crucial for a comprehensive understanding of classical conditioning.
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Generalization, discrimination, and extinction are key concepts in operant conditioning that influence how behaviors are learned and maintained.
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Avoidance learning and learned helplessness are critical concepts in understanding behavioral responses to negative stimuli.
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Instinctive drift refers to the tendency of animals to revert to their innate behaviors despite repeated reinforcement. Breland and Breland demonstrated this concept in an experiment with a raccoon. The raccoon was trained to pick up two coins and place them in a container in exchange for food. Initially, the raccoon learned to associate the coins with food, making them a conditioned stimulus or a substitute for food. However, over time, the raccoon became less willing to put the coins into the...
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Behavior Therapy01:22

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Behavior therapy incorporates diverse techniques rooted in classical conditioning principles to address maladaptive behaviors and anxiety disorders. These methods aim to reduce avoidance behaviors, foster adaptive coping mechanisms, and alter associations between stimuli and responses, making them effective in a wide range of therapeutic contexts.
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Related Experiment Video

Updated: Mar 26, 2026

Extinction Training During the Reconsolidation Window Prevents Recovery of Fear
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A sphingolipid mechanism for behavioral extinction.

Joseph P Huston1, Johannes Kornhuber2, Christiane Mühle2

  • 1Center for Behavioral Neuroscience, Institute of Experimental Psychology, Heinrich-Heine-University of Dusseldorf, Düsseldorf, Germany.

Journal of Neurochemistry
|January 21, 2016
PubMed
Summary
This summary is machine-generated.

A novel sphingolipid mechanism involving acid sphingomyelinase (ASM) and ceramide in the hippocampus is crucial for behavioral extinction and re-learning. Reduced ASM activity and ceramide levels correlate with faster extinction, suggesting new therapeutic targets for learning-related disorders.

Keywords:
acid sphingomyelinaseceramideextinctionhippocampusoperant behaviorsphingomyelin

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Area of Science:

  • Neuroscience
  • Biochemistry
  • Behavioral Science

Background:

  • Behavioral adaptation to changing reward conditions is essential; failure can lead to psychiatric disorders.
  • Behavioral extinction, the process of unlearning, involves re-learning but also emotional distress.
  • Sphingolipids, particularly ceramides, are implicated in neural plasticity and membrane function.

Purpose of the Study:

  • To investigate the role of sphingolipids in behavioral extinction.
  • To identify specific molecular mechanisms underlying the extinction of learned behavior.
  • To explore how aging and stress affect this pathway and extinction rates.

Main Methods:

  • Rats underwent behavioral extinction paradigms.
  • Acid sphingomyelinase (ASM) activity was measured in the dorsal hippocampus.
  • Sphingolipid-focused lipidomic analysis was performed.
  • Effects of aging, corticosterone, and dopamine on enzyme activity and ceramide levels were assessed.

Main Results:

  • A decrease in ASM activity and ceramide levels in the dorsal hippocampus correlated with faster behavioral extinction.
  • The decline in ASM activity was directly linked to the rate of extinction.
  • Aging and chronic stress (corticosterone) or dopamine treatment altered enzyme activity and ceramide levels, impacting extinction rates.

Conclusions:

  • A functional acid sphingomyelinase-ceramide pathway in the brain is involved in the extinction of learned behavior.
  • This pathway represents a novel cellular mechanism for behavioral plasticity.
  • Findings suggest potential therapeutic targets for psychopathological conditions related to extinction and learning.