Autonomic changes during "OM" meditation

Indian J Physiol Pharmacol. 1995 Oct;39(4):418-20.


The autonomic and respiratory variables were studied in seven experienced meditators (with experience ranging from 5 to 20 years). Each subject was studied in two types of sessions--meditation (with a period of mental chanting of "OM") and control (with a period of non-targetted thinking). The meditators showed a statistically significant reduction in heart rate during meditation compared to the control period (paired 't' test). During both types of sessions there was a comparable increase in the cutaneous peripheral vascular resistance. Keeping in mind similar results of other authors, this was interpreted as a sign of increased mental alertness, even while being physiologically relaxed (as shown by the reduced heart rate).

Publication types

  • Clinical Trial

MeSH terms

  • Adult
  • Autonomic Nervous System / physiology*
  • Galvanic Skin Response / physiology
  • Heart Rate / physiology
  • Humans
  • Male
  • Metabolism / physiology
  • Middle Aged
  • Oxygen Consumption / physiology
  • Plethysmography
  • Respiratory Mechanics / physiology
  • Vascular Resistance / physiology
  • Yoga*