What is the Origin of Yoga Nidra?

The practice originates from the ancient Indian tradition of Yoga, but the systematic, structured form used in contemporary wellness and clinical settings was developed in the mid-20th century. Its inclusion in modern health protocols is due to empirical evidence demonstrating its profound effect on neurophysiological parameters. It is recognized as a sophisticated method of mind-body medicine.

What is the Mechanism of Yoga Nidra?

The mechanism involves shifting the brainwave activity from the high-frequency beta waves of waking consciousness toward the slower alpha and theta waves characteristic of deep relaxation and meditation. This shift is mediated by the vagus nerve and directly influences the autonomic nervous system, promoting a parasympathetic dominance (rest and digest) over sympathetic activation (fight or flight). The resulting decrease in sympathetic tone leads to a measurable reduction in stress hormone release, such as cortisol and norepinephrine.

Yoga Nidra

Meaning

A profound, systematic technique of conscious, deep relaxation, often translated as “yogic sleep,” which intentionally guides the practitioner into a state between wakefulness and sleep (the hypnagogic state). This practice is a powerful non-pharmacological intervention for reducing psychological and physiological stress, thereby positively modulating the activity of the autonomic nervous system and the Hypothalamic-Pituitary-Adrenal (HPA) axis. Regular practice is clinically utilized to improve sleep quality and reduce circulating cortisol levels.