It shines the brain and therefore called kapalbhati - kapal - skull and bhatti - shinning and so Kapalbhati Pranayama. It purifies the nasal sinus area with its rapid and forced exhalations throuse the nose, alongwith it also purifies the lungs, blood, tissues and abdomen. It is also said that practice of Kapalbhati Pranayama activates the navel chakra.