Mudrās are yogic exercises described in works on Haṭhayoga, like the Gheraṇḍa Saṁhitā. They are said to help in controlling the involuntary muscular and nervous systems.
Bhujaṅginī-mudrā is the last of the 25 mudrās described in the Gheraṇḍa Saṁhitā. It consists in extending the neck a little forward and drinking the air through the mouth by opening and expanding it a little.
All the disorders of the stomach, especially indigestion, are expected to be cured by this mudrā.
See also MUDRĀS.