Enhancement of activity of the primary visual cortex during processing of emotional stimuli as measured with event-related functional near-infrared spectroscopy and event-related potentials

摘要: In this study we investigated whether event-related near-infrared spectroscopy (NIRS) is suitable to measure changes in brain activation of the occipital cortex modulated by emotional content visual stimuli. As found a previous pilot that only positive but not negative stimuli differ from neutral (with respect oxygenated haemoglobin), now measured EEG potentials and NIRS simultaneously during same session. Thereby, could evaluate subjects (n = 16) processed as well similar way. During task, passively viewed positive, negative, pictures (40 presentations were shown each category, taken International Affective Picture System, IAPS). The presented for 3 s randomized order mean interstimulus interval). over electrode positions O1, Oz, O2, Pz deoxygenated haemoglobin multichannel cortex. results clearly show an increased early posterior negativity both compared neutral. measurement less clear. Although lead significantly higher decrease than stimuli, was haemoglobin. Hum Brain Mapp 29:28–35, 2008. © 2007 Wiley-Liss, Inc.