Here is a good article on how drumming can heal you because the unique brain hemispheric synchronization, where both sides work at the same time. We are producing Alpha and Theta waves and are in a relaxed alert state while in a heightened trance state at the same time. Scientists believe this is the basis of transcendent states of consciousness.
"In 2001, Dr. Barry B. Bittman co-authored a paper titled Composite Effects of Group Drumming Music Therapy on Modulation of Neuroendocrine-Immune Parameters in Normal Subjects. Bittman’s study showed that there was a significant boost in the activity of “cellular immune components responsible for seeking out and destroying cancer cells and viruses were noted in normal subjects who drummed.” In short, drumming can increase the presence of T-cells, the white blood cell that fights viruses."
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