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Typical setup for a NIRS experiment. (a) Sensitivity of a NIRS measurement determined by the propagation of light emanated from a source position and recorded by a detector placed several centimeters away. (b) Sample NIRS probe used to measure the primary motor cortex [10]. (c) Absorption spectrum (extinction coefficients) for oxyhemoglobin and deoxyhemoglobin over the range of wavelengths typically used for optical imaging [11].
