Which neuromarketing technique looks for active areas in the brain by measuring the amount of oxygenated blood flowing through the body?

Functional magnetic resonance imaging (fMRI) is the neuromarketing technique that looks for active areas in the brain by measuring the amount of oxygenated blood flowing through the body.

Functional magnetic resonance imaging (fMRI) is a noninvasive technique for measuring the activities of the brain. This technique is used to observe the brain's functional anatomy as it reveals the parts of the brain that are involved in a certain mental process. fMRI functions by using magnetic resonance imaging to measure the small changes in blood oxygenation and flow that take place as a result of activities of nerve cells in the active areas of the brain.