Near infrared light, which readily diffuses easily through biological tissue, can be used to measure localized blood oxygenation levels of the brain to monitor where activity occurs in response to a task of stimulus.
Just how the human brain functions remains one of the greatest unsolved puzzles. To solve this mystery, brain-function imaging for visualization of brain functions has developed rapidly in recent years
The instrument is a combination of an optical microscope which allows the observation of high-resolution morphological images, with a mass spectrometer which identifies and visualizes the distribution of specific molecules.