Mudrā Pointer 8 – The Viniyoga of Jihvā Bandha taught that it was to be used……

Jihvā Bandha, as taught by Krishnamacharya is described as,
‘the big tongue has to turn back and touch the little tongue‘.
The tongue is seen as one of the Ādhāra points in the body.
In that stilling the tongue is a support for fixing the attention.
It is also known in the Gheraṇḍa Saṃhitā as Nabho Mudrā.
Here it is defined as ‘the keeping of the tongue turned upwards,
wherever you are and in whatever the activity you are engaged’.
The Viniyoga of Jihvā Bandha taught that it was to be used
in most Seated Āsana, with the exception of Seated Twists.
Though not so much in Standing Āsana,
or Backbend Āsana like Matsya Āsana.

Link to Series: 108 Mudrā Practice Pointers