Figure 4
Experimental setup: (a) photograph of the laser aperture for LLLT/placebo treatment and bb-NIRS fiber holder on a participant’s forearm. (b) Configuration of the I-shaped bb-NIRS probe holder (dark gray). The bundle holder held two optical fiber bundles with a separation of 1.5 cm. One bundle (in red) was connected to the tungsten halogen lamp and the other (in blue color) to the spectrometer. The LLLT/placebo treatments were administered on two sides of the middle section alternatively (pink circles).
