Fig. 1From: Measuring prefrontal cortical activity during dual task walking in patients with Parkinson’s disease: feasibility of using a new portable fNIRS devicefNIRS signal time courses for each task. Average time courses of oxygenated hemoglobin (O2Hb: dark, solid lines) and deoxygenated hemoglobin (HHb: lighter, dotted lines) of all subjects (N = 12) for left and right prefrontal cortices, mean ± sem. Vertical black lines indicate start and end of task performance. PFC prefrontal cortexBack to article page