Neuroscience
A popular account for how we empathise with other people's physical pain involves the idea that we perform a mental simulation of their suffering, using the pain pathways of our own brain. Support for this comes from research showing that when I see you in pain, the pain areas of my own brain are pricked into activity.
Now an intriguing study by Nicolas Danziger and colleagues has tested this simulation account with the help of patients with congenital insensitivity to pain - that is, they've grown up with abnormal pain fibres, thus rendering them unable to feel physical pain. The findings may require us to rethink the way we characterise some brain areas associated with pain processing.
Thirteen patients with the inability to feel pain, plus 13 healthy controls, had their brains scanned while they viewed videos of body parts being injured and people's painful facial expressions.
Even though the patients had never felt pain themselves, the sight of other people's pain triggered activity in the insular and anterior mid-cingulate cortex of their brains - areas which have previously been associated with pain processing, and which were also activated in the brains of the controls.
"These findings challenge the frequently advanced hypothesis that activity in these regions during observed pain corresponds to the automatic engagement of the observer's own pain circuits through a mirror matching mechanism," the researchers said.
Danziger's team argue that activity in these regions may instead reflect processing of the aversive emotional significance of what the patients were witnessing. Consistent with this account are findings showing that the insular and mid-cingulate cortex are also associated with psychological pain, induced by social exclusion or grief. Perhaps the patients in this study drew on their experience of this kind of pain so as to empathise with the physical pain of others.
This fits with the fact that the control participants, but not the patients, showed more physical arousal when their insular and mid-cingulate cortex were more active, whereas the patients did not. The implication being that the control participants were simulating the pain seen in the clips in a more "embodied" way than the patients.
A further finding was that for the patients only, their scores on an empathy questionnaire correlated with the extent to which the pain-related video clips triggered activity in midline brain regions known to be involved with taking the perspective of others (e.g. the medial pre-frontal cortex). Danziger and his colleagues said this could further reflect the fact that the patients were relying on emotional perspective taking to compensate for their inability to simulate the sensory aspects of pain.
_________________________________
Nicolas Danziger, Isabelle Faillenot, Roland Peyron (2009). Can We Share a Pain We Never Felt? Neural Correlates of Empathy in Patients with Congenital Insensitivity to Pain. Neuron, 61 (2), 203-212 DOI: 10.1016/j.neuron.2008.11.023
Post written by Christian Jarrett (@psych_writer) for the BPS Research Digest.
- The 'pain' Of Rejection
"From the Archives", first published in the Digest 10.11.03. When rock group REM sing "everybody hurts sometimes" they are, of course, referring to the inevitability of emotional anguish rather than our shared need to occasionally reach for the paracetemol....
- Imaging The Brain To Control The Mind
For the first time anywhere in the world, psychologists at California-based company Omneuron and Stanford University have demonstrated that people can be taught how to reduce their experience of pain with the aid of real-time images of their brain activity....
- Feeling Other People's Pain
When we watch someone else being pricked by a needle in their hand, the corticospinal motor neurons connected to that specific part of our own hand are inhibited, just as they would be if we’d been injected ourselves. It’s as though our brain has...
- Misery And Empathy
In Misery, a horror tale by Stephen King, Annie [the unbalanced "number one fan" of Paul Sheldon's romance novels] rescues the injured Sheldon from a car accident and seizes the opportunity to nurse her favorite writer back to health, but her...
- Project Tidbits
It ain't really good practice to blog about the research one is doing in order to avoid the risk of it being stolen from right under your nose, so I'm not gonna spill any details of the project I'm involved in now. Except just to say that...
Neuroscience
The empathic powers of those who can't feel pain
A popular account for how we empathise with other people's physical pain involves the idea that we perform a mental simulation of their suffering, using the pain pathways of our own brain. Support for this comes from research showing that when I see you in pain, the pain areas of my own brain are pricked into activity.Now an intriguing study by Nicolas Danziger and colleagues has tested this simulation account with the help of patients with congenital insensitivity to pain - that is, they've grown up with abnormal pain fibres, thus rendering them unable to feel physical pain. The findings may require us to rethink the way we characterise some brain areas associated with pain processing.
Thirteen patients with the inability to feel pain, plus 13 healthy controls, had their brains scanned while they viewed videos of body parts being injured and people's painful facial expressions.
Even though the patients had never felt pain themselves, the sight of other people's pain triggered activity in the insular and anterior mid-cingulate cortex of their brains - areas which have previously been associated with pain processing, and which were also activated in the brains of the controls.
"These findings challenge the frequently advanced hypothesis that activity in these regions during observed pain corresponds to the automatic engagement of the observer's own pain circuits through a mirror matching mechanism," the researchers said.
Danziger's team argue that activity in these regions may instead reflect processing of the aversive emotional significance of what the patients were witnessing. Consistent with this account are findings showing that the insular and mid-cingulate cortex are also associated with psychological pain, induced by social exclusion or grief. Perhaps the patients in this study drew on their experience of this kind of pain so as to empathise with the physical pain of others.
This fits with the fact that the control participants, but not the patients, showed more physical arousal when their insular and mid-cingulate cortex were more active, whereas the patients did not. The implication being that the control participants were simulating the pain seen in the clips in a more "embodied" way than the patients.
A further finding was that for the patients only, their scores on an empathy questionnaire correlated with the extent to which the pain-related video clips triggered activity in midline brain regions known to be involved with taking the perspective of others (e.g. the medial pre-frontal cortex). Danziger and his colleagues said this could further reflect the fact that the patients were relying on emotional perspective taking to compensate for their inability to simulate the sensory aspects of pain.
_________________________________
Nicolas Danziger, Isabelle Faillenot, Roland Peyron (2009). Can We Share a Pain We Never Felt? Neural Correlates of Empathy in Patients with Congenital Insensitivity to Pain. Neuron, 61 (2), 203-212 DOI: 10.1016/j.neuron.2008.11.023Post written by Christian Jarrett (@psych_writer) for the BPS Research Digest.
- The 'pain' Of Rejection
"From the Archives", first published in the Digest 10.11.03. When rock group REM sing "everybody hurts sometimes" they are, of course, referring to the inevitability of emotional anguish rather than our shared need to occasionally reach for the paracetemol....
- Imaging The Brain To Control The Mind
For the first time anywhere in the world, psychologists at California-based company Omneuron and Stanford University have demonstrated that people can be taught how to reduce their experience of pain with the aid of real-time images of their brain activity....
- Feeling Other People's Pain
When we watch someone else being pricked by a needle in their hand, the corticospinal motor neurons connected to that specific part of our own hand are inhibited, just as they would be if we’d been injected ourselves. It’s as though our brain has...
- Misery And Empathy
In Misery, a horror tale by Stephen King, Annie [the unbalanced "number one fan" of Paul Sheldon's romance novels] rescues the injured Sheldon from a car accident and seizes the opportunity to nurse her favorite writer back to health, but her...
- Project Tidbits
It ain't really good practice to blog about the research one is doing in order to avoid the risk of it being stolen from right under your nose, so I'm not gonna spill any details of the project I'm involved in now. Except just to say that...