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Related Experiment Videos

Implicit operant learning of pain sensitization.

Rupert Hölzl1, Dieter Kleinböhl, Ellena Huse

  • 1Laboratory for Clinical Psychophysiology, Otto-Selz-Institute, University of Mannheim, Postfach 103 462, D-68131 Mannheim, Germany. hoelzl@psychologie.uni-mannheim.de

Pain
|April 20, 2005
PubMed
Summary
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Operant learning can rapidly alter pain sensitivity, even unconsciously. This study shows how learned pain avoidance may contribute to chronic pain by changing perception itself.

Area of Science:

  • Neuroscience
  • Psychology
  • Pain Research

Background:

  • Operant conditioning influences chronic pain behavior.
  • The role of operant conditioning in pain perception remains unclear.
  • Fear-avoidance theory proposes learned hypersensitivity via negative reinforcement.

Purpose of the Study:

  • Investigate operant learning as a mechanism for pain sensitization.
  • Determine if hypersensitivity can be learned implicitly (unconsciously).
  • Explore the 'proximal' mechanism of sensory recalibration in pain perception.

Main Methods:

  • Used an experimental model of implicit learning.
  • Employed a behavioral adjustment method for sensitization measurement.
  • Combined with operant response shaping to induce sensitization or habituation.

Related Experiment Videos

Main Results:

  • Operant discrimination training rapidly altered pain sensitivity (seconds range).
  • Learned sensitization or habituation occurred within an hour.
  • Subjects were unaware of the reinforcement contingencies.

Conclusions:

  • Implicit operant learning can induce significant changes in pain sensitivity.
  • This provides a model for studying operant plasticity in pain perception.
  • Links basic sensory mechanisms to the clinical concept of pain-fear avoidance.