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Metabolic Cost of Stress on Brain Function
The human brain is metabolically expensive, comprising only 2-3% of body weight but using 20-30% of energy resources. Under stress, the brain prioritizes survival actions over deep thinking, leading to erratic breathing and breath-holding. Erratic breathing triggers the brain to allocate energy to essential functions like big muscle groups, heart, and lungs, causing an amygdala hijack where brain function decreases under stress.