Ancient Maharishi Patanjali’s Yoga is called Raja Yoga or Ashtanga Yoga. It has the eight limbs namely (i) yama, (ii) niyama, (iii) asana, (iv) pranayama, (v) pratyahara, (vi) dharana, (vii) dhyana and (viii) samadhi; that includes all types of existing yoga. These eight organs also have their own sub-parts. The seventh organ of yoga, “Dhyana” is beneficial in many chronic diseases such as: cancer, memory loss etc. If your memory is weak, it can be overcome by doing atleast 10-minutes meditation and focusing on the movement of the breath during inhaling & exhaling for 10-minutes but keeping eyes closed. It requires to done daily, but for atleast 30-days.