Fig. 2.

Brain responses (extracted beta weights, with standard errors) to pleasant touch, which were significantly different in healthy controls (HC), patients with chronic (CBP) and subacute back pain (SABP). *p < 0.05, ACC = anterior cingulate cortex, OFC = orbitofrontal cortex, VS = ventral striatum, S1 = primary somatosensory cortex, S2 = secondary somatosensory cortex.