Pranab Gita Commentary 1.20: "Kapidvaja" -- "During the Sãdhanã, is inverted and is entered the nasal cavity by slightly pressurizing the soft palate from the left, and this state of the sãdhaka is called Kapidvaja, the flag or banner with a monkey."
Pranab Gita: “There is a place of circular spiritual light in between the eyebrows. Now the point in the center of this light is known as “KUTA” (Kutastha). KUTA is inexpressible in words. When one sees through the KUTA, the natural shroud is removed. Around the KUTA is seen the glow of consciousness---the VIVASWAN. Inside KUTA is the Divine glow like the spherical glow of the full moon.<div">