Since 500.b.c.

It does't have one.

Because it did not rely on blind faith or dogma. It relies on each persons own personal experience.

It very much depends on what you consider meditation to be. In the modern world it has become a buzz word. Much of the meditation taught by western yoga and taichi teachers actually increases ignorance and distraction. These techniques where you are encouraged to create pleasant fantasies like walking through forests etc., may be nice … Read more

(1) Life is suffering (2) The cause of suffering is the belief in the permeanance of self and other. (3) The ending nof suffering is nirvana or great bliss. (4) and the path out of suffering is the Noble Eightfold Path [This differs in the Mahayana and Vajrayana]

Not asleep but unconcious. For this there is Kyoshu Jitsu. Or Atemi waza. The Chinese have another term for this Dip Mu.

Best to see Doctor and arrange to have it done under medical supervision.