Study on Influence of Emotional State on Work Memory Response Mechanism Using Functional Near-infrared Spectroscopy
Jiang Jin
Jiao Xuejun
Pan Jinjin
Wang Chunhui
Zhang Zhen
Cao Yong
Yang Hanjun
Abstract：Objective To explore the mechanism of hemodynamic response in brain cortex during the real complex tasks with different emotional stimuli and task loads.Methods Twenty participants were asked to complete the work memory tasks under negative picture,positive picture and neutral picture.Three indexes computed from fNIRS signal including the mean,the slope and the approximate entropy were used to describe the brain functional activity level in the frontal and motion cortical regions.Results With the increase of the task load,the brain functional activity represented by the mean index increased,while the variation of hemodynamic activity,energy supply and functional activities in the prefrontal cortex reduced and then stayed stable.The functional activity describe by ApEn became stronger in positive or negative emotional state when task load enhanced,while the ApEn changed oppositely in the neutral state when the task load increased.Conclusion The dorsolateral prefrontal cortex is sensitive to task load variation and the motor cortex is affected by the emotional state.ApEn is an effective index for describing the complexity of fNIRS signal and representing the functional activities in the brain cortex influenced by emotional states.
Keywords：functional near-infrared spectroscopyhemodynamic responseactivation levelapproximate entropy
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 115-122 )