The concept of Kundalini comes from Yogic philosophy of ancient India and refers to the mothering intelligence behind yogic awakening and spiritual maturation. It might be regarded by yogis as a sort of deity, hence the occasional capitalization of the term. According to the Yogic tradition Kundalini is curled up in the back part of the root chakra in three and one-half turns around the sacrum. Yogic phenomenology states that kundalini awakening is associated with the appearance of bio-energetic phenomena that are said to be experienced somatically by the yogi. This appearance is also referred to as Pranic Awakening. Prana is interpreted as the vital, life-sustaining force in the body. Uplifted or intensified life-energy is called pranotthana and is supposed to originate from an apparent reservoir of subtle bio-energy at the base of the spine. This energy is also interpreted as vibrational phenomena that initiate a period, or a process of vibrational spiritual development.