Objective:To examine and compare the synchronization of different brain regions during the Chinese and English Stroop tasks.Methods.Ten native Chinese speakers with a moderate command of English participated in this s...Objective:To examine and compare the synchronization of different brain regions during the Chinese and English Stroop tasks.Methods.Ten native Chinese speakers with a moderate command of English participated in this study,and event-related potentials were recorded while participants performed the Stroop task.Then wavelet-based estimation of instantaneous EEG coherence was applied to investigate the synchronization of different brain regions during Stroop task.Results:A greater negativity for the in- congruent situation than congruent situation appeared from 350ms to 600ms post-stimulus onset over frontal,central,and parietal regions in Chinese Stroop task,while the negativity was absent in English Stroop task.However,not only in Chinese Stroop task but also in English Stroop task was it found signif- icantly higher EEG coherences for the incongruent situation than congruent situation over frontal,pari- etal,and frontoparietal regions before 400ms post stimulus onset atβ(13-30 Hz) frequency band.Conclu- sion:This finding indicated that wavelet-based coherence is more exquisite tool to analyze brain electro- physiological signals associated with complex cognitive task than ERP component,and that functional syn- chronization indexed by EEG coherence is enhanced at the earlier stage while processing the conflicting in- formation for the incongruent stimulus.展开更多
Light modulates human brain function through its effect on circadian rhythms,which are related to several human behavioral and physiological processes.Functional near-infrared spectroscopy(fNIRS)is a noninvasive optic...Light modulates human brain function through its effect on circadian rhythms,which are related to several human behavioral and physiological processes.Functional near-infrared spectroscopy(fNIRS)is a noninvasive optical neuroimaging technique used for recording brain activation during task performance.This study aimed to investigate the effects of light on cognitive function,particularly in the prefrontal cortex using fNIRS.The effect of light on cognitive modulation was analyzed using the Stroop task,which was performed on 30 participants under three different light conditions(color temperature 4500 K,2500 K,and none).The behavioral results indicated that light conditions can easily and effectively modulate the performance of tasks based on the feedback,including the response time and accuracy.fNIRS showed hemodynamic changes in the bilateral dorsolateral prefrontal cortices,and the activated brain regions varied under different light conditions.Moreover,light may be regarded as a safe,effective,inexpensive,and accessible tool for modulating human cognitive function.展开更多
功能的便秘( FC )的病原学和病理是的背景 unclear.Some 研究建议心理因素可能与学习试图调查在注意与我们调查了的健康 controls.Methods 相比在 FC 病人处理和感情的地位之间的关系的这普通 problem.This 有关在有使用的 FC 的病人的...功能的便秘( FC )的病原学和病理是的背景 unclear.Some 研究建议心理因素可能与学习试图调查在注意与我们调查了的健康 controls.Methods 相比在 FC 病人处理和感情的地位之间的关系的这普通 problem.This 有关在有使用的 FC 的病人的选择注意和感情的地位数的 Stroop task.Thirty --五个 FC 病人( FCP 组)和 24 健康控制( HC )经历了展开更多
基金Supported by the National Natural Science Foundation of China(No. 60375037 and 60543003).
文摘Objective:To examine and compare the synchronization of different brain regions during the Chinese and English Stroop tasks.Methods.Ten native Chinese speakers with a moderate command of English participated in this study,and event-related potentials were recorded while participants performed the Stroop task.Then wavelet-based estimation of instantaneous EEG coherence was applied to investigate the synchronization of different brain regions during Stroop task.Results:A greater negativity for the in- congruent situation than congruent situation appeared from 350ms to 600ms post-stimulus onset over frontal,central,and parietal regions in Chinese Stroop task,while the negativity was absent in English Stroop task.However,not only in Chinese Stroop task but also in English Stroop task was it found signif- icantly higher EEG coherences for the incongruent situation than congruent situation over frontal,pari- etal,and frontoparietal regions before 400ms post stimulus onset atβ(13-30 Hz) frequency band.Conclu- sion:This finding indicated that wavelet-based coherence is more exquisite tool to analyze brain electro- physiological signals associated with complex cognitive task than ERP component,and that functional syn- chronization indexed by EEG coherence is enhanced at the earlier stage while processing the conflicting in- formation for the incongruent stimulus.
基金the financial support of the National Key R&D Program of China(Grant No.2017YFE0112000)the Shanghai Municipal Science and Technology Major Project(Grant No.2017SHZDZX01).
文摘Light modulates human brain function through its effect on circadian rhythms,which are related to several human behavioral and physiological processes.Functional near-infrared spectroscopy(fNIRS)is a noninvasive optical neuroimaging technique used for recording brain activation during task performance.This study aimed to investigate the effects of light on cognitive function,particularly in the prefrontal cortex using fNIRS.The effect of light on cognitive modulation was analyzed using the Stroop task,which was performed on 30 participants under three different light conditions(color temperature 4500 K,2500 K,and none).The behavioral results indicated that light conditions can easily and effectively modulate the performance of tasks based on the feedback,including the response time and accuracy.fNIRS showed hemodynamic changes in the bilateral dorsolateral prefrontal cortices,and the activated brain regions varied under different light conditions.Moreover,light may be regarded as a safe,effective,inexpensive,and accessible tool for modulating human cognitive function.
文摘功能的便秘( FC )的病原学和病理是的背景 unclear.Some 研究建议心理因素可能与学习试图调查在注意与我们调查了的健康 controls.Methods 相比在 FC 病人处理和感情的地位之间的关系的这普通 problem.This 有关在有使用的 FC 的病人的选择注意和感情的地位数的 Stroop task.Thirty --五个 FC 病人( FCP 组)和 24 健康控制( HC )经历了
