Oxford University Press's
Academic Insights for the Thinking World

  • Author: Richard Passingham

What has functional brain imaging discovered?

Functional magnetic brain imaging (fMRI) is a method that allows us to study the workings of the human brain while people perceive, reason and make decisions. The principle on which it is based is that, when nerve cells or neurons in a particular region become active, there is an increase in the blood supply to that brain area. This can be visualized because the scanner can be sensitized to the changes in the blood oxygen level that occur when the nerve cells become active.

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