Demographic and clinical profiles of the included studies.

i, idiopathic; m, myofascial; s, synovitis; F, number of female participants; M, number of male participants; N/A, not available from the full text; TNP, trigeminal neuropathic pain; TMD, temporomandibular joint disorder.1Mean age is calculated based on the data revealed in the original table; 2average pain intensity/unpleasantness over the last month; 3brushing-evoked/spontaneous pain; 4pain a week before/pain before scanning; 5age matched with the patient group; 6including TN patients; 7including TN patients with concomitant chronic facial pain.