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Endorphins stimulate approach behaviour, but do not reduce subjective fear. A pilot study
1Department of Medical Psychology, Limburg University, Maastricht, The Netherlands.
Behaviour Research and Therapy
|May 1, 1993
Summary
Endorphins may encourage brave behavior when facing phobias, but do not directly reduce fear. This study used an endorphin blocker to investigate the effects on spider phobics.
Area of Science:
- Neuroscience
- Psychology
- Behavioral Science
Background:
- Endorphins are endogenous opioids involved in pain relief and reward.
- Their role in modulating fear and approach behaviors in phobic individuals remains unclear.
Purpose of the Study:
- To investigate the short-term influence of endorphins on behavioral approach to a phobic object.
- To examine the effect of endorphins on the subjective experience of fear in spider phobics.
Main Methods:
- A double-blind, placebo-controlled study was conducted with 30 spider phobics.
- Participants received either a placebo, 25 mg, or 100 mg of naltrexone (an endorphin blocker).
- Behavioral approach to a spider and subjective fear ratings were measured.
Main Results:
- Naltrexone negatively influenced approach behavior towards the spider.
- Subjective fear ratings were not significantly related to naltrexone dosage.
- Findings suggest endorphins may facilitate courageous actions rather than directly reducing fear.
Conclusions:
- Endorphin release during anxiety appears to stimulate courageous behavior.
- Endorphins do not seem to directly reduce the subjective experience of fear.
- This research contributes to understanding the neurobiological underpinnings of phobic responses.