Mudras are the subtle physiological postures adopted by the body to alter the flow of prana (cosmic energy), within the physical body.The use of mudra is a powerful key for linking the material and psychic realms. Mudras sensitize the mind to the experiences of the pranic body. The purpose of the Mudra is to evoke inner forces which otherwise lie dormant in the body and also to access spiritual realms and this is what makes Mudras a powerful tool.