Technique of Brahma Mudra
Place the thumb into the palm and close the fingers around it. Bring the hands at navel so that back fingers of both hands touch each other.
Effects
This mudra is used during the practice of pranayama. It helps to harmonize the flow of prana in the three sections of the lungs.
Technique of Gyana Mudra
Fold the index fingers so that they touch the inside root of the thumbs. Straighten the other three fingers of each hand, place the hands on the knees.