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The sight of others' pain modulates motor processing in human cingulate cortex
India Morrison1, Marius V Peelen, Paul E Downing
1Centre for Cognitive Neuroscience, University of Wales, Bangor, Bangor, Gwynedd LL57 2AS, UK.
Cerebral Cortex (New York, N.Y. : 1991)
|November 25, 2006
Summary
Observing pain activates cingulate cortex regions involved in motor responses, suggesting a link between pain empathy and action preparation. This neuroimaging study reveals how the brain processes witnessed pain and its connection to motor control.
Area of Science:
- Neuroscience
- Cognitive Neuroscience
- Social Neuroscience
Background:
- The cingulate cortex and insula network are known to process both direct and observed pain.
- The role of specific cingulate areas, particularly in motor response preparation for observed pain, remains unclear.
Purpose of the Study:
- To investigate whether dorsal anterior and midcingulate cortex regions, involved in motor responses to felt pain, also process observed pain.
- To explore the link between pain observation, motor processing, and functional topography in medial premotor regions.
Main Methods:
- Functional magnetic resonance imaging (fMRI) was used to study participants viewing animations of noxious or innocuous implements interacting with a hand.
- Participants performed or suppressed button-press responses based on the animation's events.
- Behavioral reaction times and blood oxygen level-dependent (BOLD) signal changes were analyzed.
Main Results:
- Behavioral responses were fastest for noxious-hit trials, indicating a strong influence of pain and contact.
- fMRI data showed increased activation in midcingulate, dorsal anterior, and dorsal posterior cingulate regions specifically during noxious-hit trials.
- Activation in these cingulate regions correlated with the execution of motor responses, linking pain observation to motor control.
Conclusions:
- The study demonstrates that cingulate cortex regions involved in motor preparation for felt pain are also active during the observation of painful events.
- Findings suggest a functional topography in medial premotor cortex, integrating pain-selective and motor-selective processes for "pain empathy."
- Observed pain processing is intrinsically linked to motor system engagement.
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