Autonomic functions tests Autonomic nervous system Body mass index Cold pressor test Obesity Valsalva manoeuver.

Background Amplified muscle activity in reaction to daily life stressors might explain chronic pain temporomandibular disorder (TMD). Objectives To assess whether patients with myofascial TMD (MFP) react standardised greater masticatory than demographically matched controls. Methods A total of 124 female MFP and 46 pain-free controls rated distress while performing a series stress-reactivity ta...

The present study examined how cold pressor stimulation influences electrophysiological correlates of arousal. We measured the P50 auditory evoked response potential in two groups of subjects who immersed their foot in either cold (0-2°C) or room temperature (22-24°C) water for 50 seconds. The P50, which was recorded before and after stimulation, is sleep-state dependent and sensitive to states...

BACKGROUND The cold pressor task (CPT) was originally developed as a clinically indicative cardiovascular test, and quantifies vascular response and pulse excitability when a subject's hand is immersed into ice water. Since the test procedure results in a gradually increasing cold pain, the CPT has been widely used as a nociceptive stimulus in experimental studies on adults and children. AIM ...

To elucidate the role of autonomic nervous system in functional dyspepsia patients, we examined 24-h heart rate variability: the basal levels, responses after lunch, cold pressor and mental arithmetic tests, and the efficacy of an autonomic drug (tofisopam). The high-frequency component (HF: 0.15-0.40 Hz) and the ratio of HF to the low-frequency component (LF: 0.04-0.15 Hz; LF/HF ratio) were us...

This is the first MRI study to report differences in brain structure size between low and highly hypnotizable, healthy, right-handed young adults. Participants were stringently screened for hypnotic susceptibility with two standardized scales, and then exposed to hypnotic analgesia training to control cold pressor pain. Only the highly hypnotizable subjects (HHs) who eliminated pain perception ...

Apley, J., Haslam, D. R., and Grant Tulioh, C. (1971). Archives of Disease in Childhood, 46, 337. Pupillary reaction in children with recurrent abdominal pain. An investigation was carried out with 3 groups of children to compare pupillary reactions (as an index of autonomic function) in response to stress induced by the cold pressor test. It was found that normal pupillary reactions are modifi...

Background Research on placebo analgesia commonly focuses the impact of information about direction (i.e., increase or decrease pain) and magnitude expected analgesic effect, whereas temporal aspects expectations have received little attention so far. In a recent study, using short-lasting, low-intensity stimuli, we demonstrated that onset is influenced by information. Here, investigate whether...