And, while I'm in full spate, does anyone else think this piece of research is extremely (potentially) revealing and germane to the issue?: (from The Research Digest)
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6. Acupuncturists insensitive to other people's pain
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When we witness other people undergoing a painful experience, our brains
respond as though we are experiencing that pain ourselves. We're simulating
their trauma in our own pain pathways. This is pretty handy when it comes to
empathy but could be a problematic distraction for people, such as dentists
and acupuncturists, who have to dish out pain as part of the help they
provide to their clients.
Yawei Cheng and colleagues wondered if medical professionals learn to
suppress their emotional brain response to the sight of other people's pain,
thus allowing them to plough on with their professional handiwork
undeterred.
Fourteen professional acupuncturists and 14 controls had their brains
scanned while they watched needles being inserted into mouths, hands and
feet, or less eye-wateringly, while blunt 'Q-tips' were touched against the
same areas.
Consistent with past research, when the control participants watched the
needle insertions, the pain regions of their brains leaped into action, as
though they themselves were experiencing the pain. By contrast, there was
barely a flicker of pain-related activity in the brains of the
acupuncturists. Instead, their brains showed activity in frontal regions,
known to be involved in emotional control, as well as memory-related areas.
(When it came to the pain-free images featuring blunt Q-tips, the brains of
the acupuncturists and controls responded in the same way).
The behavioural data fitted well with these brain imaging results: the
control participants reported finding the needle images far more unpleasant
and painful than did the acupuncturists.
It's not that the acupuncturists are a sadistic bunch: personality scales
showed they were just as sensitive and empathetic as the control group.
Instead, the researchers said their results show that rather than
"responding on the basis of automatically activated stimulus-response
linkages...humans regulate their emotions by relying on higher cognitive
processes involving knowledge in working memory, long-term memory and
meta-cognition."
The researchers said that, in the case of doctors, such emotional control
was necessary for "successful professional practice", allowing medical
professionals to "regulate their feelings of unpleasantness generated by the
perception of pain in others."
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CHENG, Y., LIN, C., LIU, H., HSU, Y., LIM, K., HUNG, D., DECETY, J. (2007).
Expertise Modulates the Perception of Pain in Others. Current Biology,
17(19), 1708-1713.
http://dx.doi.org/10.1016/j.cub.2007.09.020
Author weblink:
http://www.tpech.gov.tw/English/eIndex.aspx
What does this tell us about how the exigencies of life can radically change our opinion of others' sufferings (including, in our case, other species) ?!! Can this help us to understand how training ideals, economic/professional considerations etc are able to override perception of aversion in "patients" - in the widest sense of that word? And how the toughening process, which pulls the wool over our eyes so often, in our dealings with other species as well as with our own, can, thankfully (or not?) be reversed - which is presumably what happens when people give up - for example - harsh breaking methods/wearing fur coats etc etc etc?
Sorry, Debbie, don't want to stray too far from your points, which are most interesting and important ones - I hope this seems at least tangentially relevant!
Rita