"..the physiological counterpart of kuurma-naaDii might well be the vagus nerve, which is the main parasympathetic nerve,"
In the human, who is the highest expression of God on earth, it is the vagus or tenth cranial nerve that is the most receptive to this solar fire or energy, the spiritual fire coming down, the fire of the macrocosm. This fire energizes humans and uses them to express the qualities of love and wisdom. =Charlie Lutes ---In FairfieldLife@yahoogroups.com, <he...@hotmail.com> wrote : Number 5, at least in my set (English: BT?), is the one that seems to correspond YS III 31: kuurma-naaDyaaM* sthairyam. Some translations: kUrmanaaDyaaM sthairyam [HA]: Calmness Is Attained By Samyama On The Bronchial Tube. [IT]: (32): (By performing Samyama) on the Kurma-nadi steadiness. [VH]: On the tortoise duct (tortoise), steadiness. [BM]: From perfect discipline of the “tortoise vein,” one’s being becomes steady. [SS]: (32): By samyama on the kurma nadi (a subtle tortoise-shaped tube located below the throat), motionless in the meditative posture is achieved. [SP]: (32) By making samyama on the tube within the chest, one acquires absolute motionlessness. [SV]: (32): On the nerve called Kurma (comes) fixity of the body. --------- I used to think that the "oiling" of joints, less tight muscles and harder *rections after doing siddhis was mainly due to flying, but now it seems to me the main culprit might well be actually the BT above, after doing it a couple of times in isolation, or whatever. It seems to me the physiological counterpart of kuurma-naaDii might well be the vagus nerve, which is the main parasympathetic nerve, I believe. Wiki: The parasympathetic system is responsible for stimulation of "rest-and-digest" or "feed and breed" https://en.wikipedia.org/wiki/Parasympathetic_nervous_system#cite_note-2 activities that occur when the body is at rest, especially after eating, including sexual arousal https://en.wikipedia.org/wiki/Sexual_arousal, salivation https://en.wikipedia.org/wiki/Salivation, lacrimation https://en.wikipedia.org/wiki/Tears (tears), urination https://en.wikipedia.org/wiki/Urination, digestion https://en.wikipedia.org/wiki/Digestion and defecation https://en.wikipedia.org/wiki/Defecation. Its action is described as being complementary to that of the sympathetic nervous system https://en.wikipedia.org/wiki/Sympathetic_nervous_system, which is responsible for stimulating activities associated with the fight-or-flight response https://en.wikipedia.org/wiki/Fight-or-flight_response. (Sorry for my inaccurate wording. As I've told before, I'm a "grammarian", certainly not a "semantician"!) * locative (in, at, on, into, etc) singular from naaDii