“…Acute physical pain is known to spark specific and complex physiological responses, evinced by increased skin conductance, faster heart rate, and higher levels of blood cortisol, adrenaline and noradrenaline, heralding pain-activation of the hypothalamic-pituitary-adrenal axis and the sympathetic nervous system (Benarroch & Sandroni, 2005;Pacák & McCarty, 2000). Neuroimaging studies show pain is associated with activity in an extensive subcortical and cortical network, referred to as the pain matrix (Legrain, Iannetti, Plaghki, & Mouraux, 2011;Melzack, 1999Melzack, , 2005. This network integrates ascending signals and modulates descending feedback, and includes the dorsal anterior cingulate cortex, insula, periaqueductal grey, primary somatosensory cortex and prefrontal cortex (C. R. Chapman, 2005;Coghill, McHaffie, & Yen, 2003;Eisenberger, 2012c;Tracey, 2010).…”