relation: https://khub.utp.edu.my/scholars/14773/
title: Working memory performance under a negative affect is more susceptible to higher cognitive workloads with different neural haemodynamic correlates
creator: Feng, Y.X.
creator: Kiguchi, M.
creator: Ung, W.C.
creator: Dass, S.C.
creator: Hani, A.F.M.
creator: Tang, T.B.
creator: Ho, E.T.W.
description: The effect of stress on task performance is complex, too much or too little stress negatively affects performance and there exists an optimal level of stress to drive optimal performance. Task difficulty and external affective factors are distinct stressors that impact cognitive performance. Neuroimaging studies showed that mood affects working memory performance and the correlates are changes in haemodynamic activity in the prefrontal cortex (PFC). We investigate the interactive effects of affective states and working memory load (WML) on working memory task performance and haemodynamic activity using functional near-infrared spectroscopy (fNIRS) neuroimaging on the PFC of healthy participants. We seek to understand if haemodynamic responses could tell apart workload-related stress from situational stress arising from external affective distraction. We found that the haemodynamic changes towards affective stressor-and workload-related stress were more dominant in the medial and lateral PFC, respectively. Our study reveals distinct affective state-dependent modulations of haemodynamic activity with increasing WML in n-back tasks, which correlate with decreasing performance. The influence of a negative effect on performance is greater at higher WML, and haemodynamic activity showed evident changes in temporal, and both spatial and strength of activation differently with WML. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
publisher: MDPI AG
date: 2021
type: Article
type: PeerReviewed
identifier:   Feng, Y.X. and Kiguchi, M. and Ung, W.C. and Dass, S.C. and Hani, A.F.M. and Tang, T.B. and Ho, E.T.W.  (2021) Working memory performance under a negative affect is more susceptible to higher cognitive workloads with different neural haemodynamic correlates.  Brain Sciences, 11 (7).   ISSN 20763425     
relation: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85111155066&doi=10.3390%2fbrainsci11070935&partnerID=40&md5=88c8a289f638297f37a958f603d7f1f7
relation: 10.3390/brainsci11070935
identifier: 10.3390/brainsci11070935