INTRODUCTION
various pain, neuropathic pain, sleep disturbance, sleep disorders, Lanza et, CRPS, pain
CHRONIC PAIN
Insufficient sleep and pain are highly interrelated, and sleep disturbance is a risk factor for developing and exacerbating chronic pain both in the general population and in those with various pain conditions (Finan et al., Repetitive transcranial magnetic stimulation (rTMS) is a noninvasive neuromodulation method that has proven efficacious in neuropathic pain. A few studies have reported analgesic effects of rTMS also in CRPS patients (Picarelli et al., The exact mechanisms of how noninvasive brain stimulation improves sleep are only partially known. Some sleep disorders associate with distinctive patterns of neurophysiological alterations, which provide a rationale for different neuromodulatory protocols (Lanza et al., This study explores sleep in CRPS patients by assessing polygraphic biosignals recorded by a multisensory sleep tracker, the Oura ring. Several validation studies have compared the Oura ring with PSG (De Zambotti et al., 