Sarvangasana :

 By pressing the chest against the chin this asana stimulates the thyroid gland, balancing the circulatory, digestive, reproductive, nervous and endocrine systems. Together with the enriched blood flow to the brain, it also tranquillize the mind.

 Shirshasana :

 This asana is very powerful for awakening Sahasrara Chakra and therefore it is considered the greatest of all asanas. Sirshasana increases the blood flow to the brain and pituitary gland.

 Halasana :

 The movement of the diaphragm which takes place during the practice of halasana massages all the internal organs , activates the digestion, reliving constipation and dyspepsia, revitalizes the spleen and the suprarenal glands promotes the production of insulin by the pancreas and improves liver and kidney function.