Home Research Publications People Contact Links


Hypnotic Analgesia - Is it True

Hypnotherapy is becoming a respectable alternative for an array of clinical and social conditions. This work aims to scientifically verify the hypnotic analgesia phenomenon and to develop methods for the automatic monitoring for hypnotic analgesia of patients in a clinical environment.

Galvanic Skin Response (GSR) was used as a pain indicator and EEG frequency bands were used to determine the hypnotic status of the subjects. Two types of experiments were conducted namely Pain-GSR (PG) and Hypnosis-Pain-GSR (HPG).

These experiments were carried in two different conditions: pain and no-pain The subjects were of both the gender in the age group of 20 to 30 years old. The PG experiment was conducted in a laboratory setup. However the HPG experiments were conducted in a clinical setup with the help of an experienced hypnotherapist. Both the experiments were conducted in same ambient conditions. The hypnotherapist inserted a needle on the subjects skin for pain stimulus. During the HPG experiments GSR and EEG were observed at four stages namely, Pre Pain without Hypnosis, Pain without Hypnosis, During Pain with Hypnosis, and After Hypnosis without Pain stages.

Pain Stimulus using a needle applied to a patient during the HPG experiment is shown in the above figure.

In HPG experiment, the conductivity of skin remained same at Pre "Pain without Hypnosis" and "During Pain with Hypnosis" stages. The spectral analysis of EEG during hypnosis shows the frequency bands in lower theta and alpha range.

The results of HPG experiment show that the subjects do not feel pain during hypnotic analgesia. In both PG and HPG experiments we used induced pain, in stead of real pain. As the induced pain may not be the representative of all types of pains but only some type of pains, the further work includes experiment with more subjects in a clinical setup with actual pain.

Publications

  1. K Shankar, M Manivannan, Peter Fernandez, "GSR Analysis During Hypnotic Analgesia" Accepted in International Journal of Systemics, Cybernetics and Informatics (IJSCI) Apr 2008.
  2. S Deivanayaki, M Manivannan, Peter Fernandez, "Spectral Analysis of EEG signals during Hypnosis" Accepted in International Journal of Systemics, Cybernetics and Informatics (IJSCI) Jan 2008.
  3. Deivanayagi.S., Shankar.K., Manivannan.M., and Peter Fernandez.M, "Hypnotic Analgesia - Towards Automatic Monitoring" Accepted for ISSPCON 2008 Vellore.


Home Research Publications People Contact Links

Last Updated: May 26, 2008 4:45 PM Comments: Manivannan M