Although research on facial expressions of pain has a long history, little is known about the cerebral mechanisms regulating these expressions. It has been suggested that the medial prefrontal cortex (mPFC) might be involved in regulating/inhibiting the degree to which pain is facially displayed. To test whether such a prefrontal regulation does indeed take place, we reduced medial prefrontal excitability via repetitive transcranial magnetic stimulation (rTMS) and assessed its effect on facial expressions.
from The Journal of Pain http://ift.tt/1P9oEZT
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