Fig. 4From: Insomniacs show greater prefrontal activation during verbal fluency task compared to non-insomniacs: a functional near-infrared spectroscopy investigation of depression in patientsWaveforms of [oxy-Hb] values during the VET in the 26 channels over prefrontal regions in patients with insomnia and without insomnia and HCs. Red boxes indicate channels with significantly higher [oxy-Hb] values in the insomnia group than in the without insomnia group. Blue boxes indicate channels with significantly higher [oxy-Hb] values in the without insomnia group than in the insomnia groupBack to article page