Fig. 2From: Aging effects on prefrontal cortex oxygenation in a posture-cognition dual-task: an fNIRS pilot studyO2Hb changes in all four conditions (a); BORG scale of perceived exertion (b) Note: no significant differences were observed between the two groups. However, significant changes between conditions are marked with *. The calculation of relative O2Hb is stated in paragraph “2.3 Cerebrovascular setup”.a.Back to article page