The ultimate purpose of yoga is the awaking of kundalini Shakti, the evolutionary energy in man. Practicing asanas stimulates the chakras, distributing the generated energy of kundalini all over the body. About thirty-five asanas are specifically geared to this purpose; Bhujangasana for Manipura chakra, Sarvangasana for vishnuddhi, sirshasana for Sahasrara, and so on. The other asanas regulates and purify the Nadis facilitating the condition of prana throughout the body. The main object of hatha yoga is to create a balance between the interacting activities and processes of the pranic and mental forces. Once this has been achieved, the impulses generated give a call of awakening to Sushumna Nadi, the central pathway in the spine, through which the kundalini Shakti rises to the Sahasrara chakra, thereby illumining the higher centers of human consciousness.