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Perceived controllability modulates the neural response to pain
Tim V Salomons1, Tom Johnstone, Misha-Miroslav Backonja
1W. M. Keck Laboratory for Functional Brain Imaging and Behavior, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
Summary
Perceived control over pain significantly reduces brain activity in key pain-processing areas. This finding highlights how cognitive factors, like control, influence the neural basis of pain perception.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Pain Research
Background:
- Pain perception is influenced by cognitive and affective contexts, not just peripheral input.
- Perceived control over pain impacts tolerance, learning, motivation, and coping.
- Previous research suggests profound neural effects of perceived control, but neuroimaging studies were lacking.
Purpose of the Study:
- To investigate the neural underpinnings of perceived pain controllability using neuroimaging.
- To determine if perceived control modulates brain activation in established pain pathways.
Main Methods:
- Functional magnetic resonance imaging (fMRI) was employed.
- Subjects' belief in their ability to control a nociceptive stimulus was manipulated.
- The physical characteristics of the nociceptive stimulus remained constant across conditions.
Main Results:
- Perceived pain controllability led to attenuated activation in key pain-processing brain regions.
- Specifically, reduced activation was observed in the anterior cingulate cortex, insular cortex, and secondary somatosensory cortex.
- These findings indicate cognitive modulation of neural pain responses.
Conclusions:
- Neural activation in core pain areas is modulated by cognitive variables like perceived control.
- Pain neuroimaging studies may overestimate stimulus-driven responses and underestimate the impact of cognitive context.