Why the study?
Does hypnotizability level affect heart rate and heart-rate variability during nociceptive-pressor stimulation with and without suggestions of analgesia?
Does hypnotizability level affect heart rate and heart-rate variability during nociceptive-pressor stimulation with and without suggestions of analgesia?
Hypnotizability level does not appear to significantly affect heart rate or heart-rate variability during pain stimulation or suggestions of analgesia without deliberate hypnotic induction.
No association of hypnotizability with HR or HRV during pain or analgesia suggestions; leaves open effects of induction on autonomic responses.
Heart rate and heart-rate variability (HRV) were studied through a set of different methods in high (highs) and low hypnotizable subjects (lows) not receiving any deliberate hypnotic induction in basal conditions (simple relaxation) and during nociceptive-pressor stimulation with and without suggestions of analgesia. ANOVA did not reveal any difference between highs and lows for heart rate and for the HRV indexes extracted from the series of the interbeat intervals (RR) of the ECG in the frequency (spectral analysis) and time domain (standard deviation, Poincare plot) in both basal and stimulation conditions. Factors possibly accounting for the results and likely responsible for an underestimation of group differences are discussed.
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Santarcangelo et al. (2008) studied this question.
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