Research Article

A DAQ-Device-Based Continuous Wave Near-Infrared Spectroscopy System for Measuring Human Functional Brain Activity

Figure 5

Comparison of time courses of oxy-Hb (a) and deoxy-Hb (b) acquired from ETG-4000 and custom-made system during Valsalva maneuver task.
107320.fig.005a
(a)
107320.fig.005b
(b)