Yes, it is natural and worldwide. ASCs is also known as altered state of mind or mind alteration. it is any condition which is very different from the normal waking state beta wave. the concept is related topsychopathology. Jane thesis defines that human beings were originally on the balance between the two sides of the brain i.e the left hemisphere which is responsible for language, writing and arithmetic, and all the other things that admiration for our culture. then gradually the right hemisphere which is responsible for empathy, intuition and emotions flow for other desires.ASCs can occur infrequently during normal waking state which might last for few minutes to hours.
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