Neurological Understanding of Yoga By Vinod Deshmukh Conscious alertness or vigilance has two quantum modes of expression: A) Transient, phasic, directed, effortful, sequential, differentiate, dualistic and a choppy-ocean or a river-like like, vector-attention with a specific experiential content or form and B) Continuous, tonic, non-directed, effortless, timeless, parallel, integrate, holistic and a calm-ocean or lake-like, matrix-alertness without any specific experiential content or form, other thanitself. Human brain has two reciprocally functioning, cortical networks that subserve these two fundamental modes of consciousness. A) The transient choppy sequential alertness is mediated by the dorso-lateral, fronto-parietal-temporal-occipital network with streams of speech, working memory and thoughts, and B) the continuous calm, silent and serene alertness is mediated by the midline thalamic-cingulate-frontal-insular cortical network. We are usually dominated by the transient dualistic mode with attention to some object with a dualistic experience. We are hardly aware of the underlying substratum of sustained, holistic and essential self-awareness.Human body, mind, speech and ego are energized by bio-neural energies including gravity, mechanical, heat, electro-chemical, protonic or H-ion and electro-magnetic energies. There is a homeostatic regulation of human energy-awareness at multiple levels of brain-mind organization.Human beings are usually attracted to pleasant stimuli or situations and repelled by the painful ones (approach and avoidance responses). Most people are constantly defensive of what they have (mine), what they think they are (me or self-as-object) and who they feel they are (I, doer and experiencer). Yoga teaches us to overcome these stressful, self-defensive reactions, which are usually accompanied by greed, fear and other negative emotions and to free ourselves from the limited I-me-mine perspective.
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