NDLI: EEG measures reveal dual-task interference in postural performance in youngadults

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EEG measures reveal dual-task interference in postural performance in youngadults

Content Provider	PubMed Central
Author	Little, C. Elaine Marjorie, Woollacott
Copyright Year	2014
Abstract	The study used a dual-task (DT) postural paradigm (two tasks performed at once)that included electroencephalography (EEG) to examine cortical interference when a visualworking memory (VWM) task was paired with a postural task. The change detection task wasused, as it requires storage of information without updating or manipulation and predictsVWM capacity. Ground reaction forces (GRFs) (horizontal and vertical), EMG, and EEGelements, time locked to support surface perturbations, were used to infer the activeneural processes underlying the automatic control of balance in 14 young adults. Asignificant reduction was seen between single task (ST) and DT conditions in VWM capacity(F(1,13) = 6.175, p < 0.05,r = 0.6) and event-related potential (ERP) N1 componentamplitude over the L motor (p < 0.001) and R sensory(p < 0.05) cortical areas. In addition, a significant increase inthe COP trajectory peak (pkcopx) was seen in the DT versus ST condition. Modulation of VWMcapacity as well as ERP amplitude and pkcopx in DT conditions provided evidence of aninterference pattern, suggesting that the two modalities shared a similar set ofattentional resources. The results provide direct evidence of the competition for centralprocessing attentional resources between the two modalities, through the reduction inamplitude of the ERP evoked by the postural perturbation.
Related Links	http://dx.doi.org/10.1007/s00221-014-4111-x
Ending Page	37
Page Count	11
Starting Page	27
File Format	PDF
ISSN	00144819
e-ISSN	14321106
Journal	Experimental brain research
Issue Number	1
Volume Number	233
Language	English
Publisher Date	2015-01-01
Access Restriction	Open
Subject Keyword	Neuroscience(all) Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Neuroscience

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