Optical Imaging Technique: A Powerful Tool for Neuroscience

Functional near-infrared spectroscopy (fNIRS) is a non-invasive technique that uses low levels of light (650-900 nm) to measure change in cerebral blood oxygenation levels through sensors placed on the surface of the scalp. Over the last several decades, this technique has been utilized in a growing number of functional and resting-state brain studies. The lower operation cost, portability, and versatility of this method make it an alternative to methods such as functional magnetic resonance imaging for studies in pediatric and special populations and for studies without the confining limitations of a supine and motionless acquisition setup.