The technique that uses reflected infrared light to measure oxygen consumption by the brain is:

A) fMRI.
B) fNIRS.
C) cytogenetics.
D) cryogenetics.

Infrared Light

Electromagnetic radiation with wavelengths longer than visible light but shorter than microwaves, often used in heating, night vision equipment, and remote controls.

Brain

The organ in the head that controls thought, memory, feelings, and activity.

fNIRS

Functional Near-Infrared Spectroscopy, a neuroimaging method used to measure brain activity based on hemodynamic responses.