Yoga for Concentration And Memory - Kaki Mudra

Kaki Mudra -
Sit in Sidhasana, draw the tongue out in a tube-like shape and inhale through the tongue. Retain the breath. Draw the tongue in and perform Yoni mudra . Exhale through the left nostril. Again do the same and exhale through the right nostril. Do it several times.
Benefits :This Kaki mudra cools the body, removes excess of bile, purifies the blood and develops the mystic vision.