> BOLD signals are great, but they are based on oxygenation of blood, which is a latent, and at best a second order effect for metabolic activity, which is then

> BOLD signals are great, but they are based on oxygenation of blood, which is a latent, and at best a second order effect for metabolic activity, which is then reference to be brain activity... To add to this fNIR is only really able to penetrate a marginal depth of a few centimeters of periphery cortical tissue. Even if it was a perfect signal, the functional information it would provide would not give us a full picture of all the sub-cortical activity.