According to the passage, which of the following statements is true?A.The imaging techniqu
According to the passage, which of the following statements is true?
A.The imaging techniques not only measure nerve-cell activity but also the extra flow of blood that surges to the most active brain areas.
B.The imaging techniques do not measure nerve-cell activity directly, but measure the flow of blood that surges to the most active brain areas.
C.The imaging techniques measure the extra flow of blood that surges to the most active brain areas.
D.The imaging techniques measure all the activities of the living brain.