CLINICAL MEDICINE

Detailed explanation-1: -In fact, the brain’s oxygen demands are enormous; despite comprising only 2 percent of the body, our brains consume 20 percent of the body’s oxygen supply. Scientists have long understood that there is a direct correlation between brain activity and blood flow.

Detailed explanation-2: -In fact, the brain uses about a fifth of your body’s total oxygen supply. Oxygen helps send nerve signals and messages throughout the body. When the brain doesn’t get enough oxygen, brain cells begin to die. Cell death happens within 5 minutes of low oxygen.

Detailed explanation-3: -Gray matter consumes more than twice as much oxygen as white matter, with highest consumption occurring in the medial occipital lobe (125).

Detailed explanation-4: -Summary: Researchers directly measured oxygen levels in an intact brain and correlated it with neural activity. During normal activity, only 50% of oxygen is used for neural activity, the remaining 50% is required for glial cells and maintaining the metabolic rate of other nerve cells.