Etymology and origins
The name comes from the Sanskrit words janu (जानु, jānu) meaning "knee", shirsha (शीर्ष, śīrṣa) meaning "head", and āsana (आसन) meaning "posture" or "seat".
The pose is a modern one, first seen in the 20th century. It is described in Krishnamacharya's 1934 Yoga Makaranda, and in the works of his pupils, B. K. S. Iyengar's 1966 Light on Yoga and Pattabhi Jois's Ashtanga Vinyasa Yoga.
In a seated position, one leg is extended with toes pointing upward, and the other leg is bent with knee pointing away from the straight leg and the sole of the foot in by the groin. The torso turns and folds over the extended leg.
- Paschimottanasana, a seated forward bend that does not involve twisting
- "Janu Shirshasana A". Ashtanga Yoga. Retrieved 2011-04-09.
- Sjoman, Norman E. (1999) . The Yoga Tradition of the Mysore Palace. Abhinav Publications. pp. 88, 100, 102. ISBN 81-7017-389-2.
- Krishnamacharya, Tirunamalai (2006) . Yoga Makaranda. Translated by Ranganathan, Lakshmi; Ranganathan, Nandini. pp. 77–83.
- Iyengar, B. K. S. (1979) . Light on Yoga: Yoga Dipika. Unwin Paperbacks. pp. 148–151. ISBN 978-1855381667.
- Saraswati, Swami Satyananda (2003). Asana Pranayama Mudra Bandha. Nesma Books India. pp. 235–236. ISBN 978-81-86336-14-4.