Biology · Human Brain and Metabolism

Consider the following statements based on recent neuroimaging research regarding human brain lifespan metabolic development: I. The researchers mapped brain glucose and oxygen metabolic trajectories, dividing the human lifespan into distinct metabolic phases from birth to old age. II. The study concluded that global brain metabolic rates peak consistently between 20 and 30 years of age before establishing a linear decline. III. The underlying comprehensive metabolic dataset was entirely constructed using structural MRI scans rather than nuclear medicine techniques. How many of the above statements are correct?