Satkriya or Satkarma are the 6 cleansing processes to prepare the system with free energy flow, as prescribed in Hatha Yoga for effective yogic practices.
Neti: uses saline water to cleanse the nasal passages which clears the dirt and debris along the sinuses, relieving the conditions therein. This technique also serves the entire ENT circuit and related disorders. Further still, it has a soothing and cooling influence on the brain, and balances both the hemispheres, as it stimulates the cranial nerves. Brain cells are activated, which improves memory and concentration, and also corrects neurological disturbances.
Dhouti: is a process in which a recommended quantity of saline water is ingested, to flush out the entire digestive tract of deposits, accumulated substances, old biles, acids, and gases that harbour diseases, thus freeing up the system of a toxic environment. It activates the ultrafiltration process via the kidneys owing to greater water pressure, relieving of stones and infections, urea and uric acid conditions. The cellular activity gets heightened as a result, wherein the metabolism mechanism is set right, and the nerves are activated and controlled.
Vamana dhouti: also known as Kunjal, is a popular practice to cleanse the stomach and the upper alimentary canal, by gushing out saline water on evoking a reverse reflex. This expulsion takes away excess mucous, freeing up all the constrictions and inflammations and with resultant dilation of the stimulated bronchus, it all helps to remedy any respiratory ailments. The strong muscular contractions induced at the stomach walls tones and stimulates the abdominal organs. This dynamic practice activates the sympathetic nerves, balancing the autonomic nervous system and has a strong effect on the brain centers.
Nauli: is a specialized technique that involves the control and movement of the abdominal muscles in order to boost abdominal functioning, that of digestion, assimilation, absorption, and intestinal peristalsis for elimination. It also regulates the reproductive system. The mastery of this kriya helps to stir up and work the major energies and fires located therein.
Basti: meant for cleansing of the eliminatory device, Jalabasti involves drawing of water up the anus, the rectum, and the colon. Mulashodhana makes use of turmeric root which serves as an antiseptic and a blood purifier and with clockwise and anticlockwise movements, it stimulates peristaltic movements, affects the accessory organs of the digestive system. and revives the autonomic nervous system.
Trataka: is concentrated gazing, which does not strictly qualify as a cleansing process, yet as part of satkriya, it serves as a powerful technique to stimulate the higher faculties. It improves the sight, brings nervous stability, develops memory and concentration, strengthens the mind inducing thoughtlessness, activates the pineal gland leading to the removal of calcification and degeneration and establishing longevity.
Kapalabhati: by definition, purifies the frontal region of the brain, by vigorous and rapid exhalations. The fast and forceful movement of the air hits the frontal brain, clarifying the sinuses and the cerebral channels. Active and dynamic expiration brings mental activity and visions to a stop and is known to result in a shining and radiating forehead.