Figure 11.

fNIRS GLM group analysis of ΔHbR signals. The 12 gray shaded areas indicate the forehead region. Circles indicate the positions of the four fNIRS channels. The color of the circles represents the mean of significant ΔHbR concentration changes related to one of four regressors in the GLM model. From left to right the four columns represent: ΔHbR related to cerebral activation and to physiological noise: (A) cerebral activation, (B) Mayer waves, (C) skin blood flow, (D) respiration. The three rows (from top to bottom) correspond to: ΔHbR based on m₀, m₁, and V.