Re: Fingers spread or together?
If you study an acupuncture chart, the ki, or chi, gland is at Triple warmer 4.
A similar point for the legs is UB 58, which is the he-she (that's not english) point for the triple warmer in the legs.
The use of this point may help explain why so much seiza training was used in earlier Aikido training.
The triple warmer is the only acupuncture channel which has no equivilent in western medicine.
Its used to requlated your 'internal weather', the chest is hot, mid body warm, lower body, cool,
When you mix them together, you get a balance of energy. A balance of yin/yang, if you like.
The nearest equivilent in western medicine is the hypothalamus.