GABA x glutamate, yin x yang

Revisiting the notion that MNS tonality range can be consciously controlled. Not sure if this means specific CNS neurotransmitters are being consciously throttled up and down via conscious memory recall. Maybe GABA and glutamate, maybe something else. I played with the practice somewhat, but did not extend my study to the neurochemistry 20+ years ago in college. Recent readings on the effects of chamomile tea as a GABAergic, after some practical effects, have drawn my attention back to the old study of language reification for fuzzier concepts of yin and yang in non-standard theoretical Chinese history of physiology.