Prefrontal cortex activity during motor tasks with additional mental load requiring attentional demand: A near-infrared spectroscopy study

•We investigated the right prefrontal cortex activation during a dual-task paradigm.•The performance on the arithmetic task decreased when the level of force increased.•Submaximal handgrip tasks increased relatively prefrontal activity.•Motor and mental stimuli do not interact in generating higher p...

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Bibliographic Details
Published in:Neuroscience research 2013-07, Vol.76 (3), p.156-162
Main Authors: Mandrick, Kevin, Derosiere, Gérard, Dray, Gérard, Coulon, Denis, Micallef, Jean-Paul, Perrey, Stéphane
Format: Article
Language:English
Subjects:
Adult
Arithmetic task
Attention - physiology
Brain Mapping - methods
Cognitive science
Divided attention
Dual-task
Hand Strength
Handgrip force variability
Humans
Male
Near-infrared spectroscopy
Neuroscience
Prefrontal cortex
Prefrontal Cortex - physiology
Psychomotor Performance - physiology
Spectroscopy, Near-Infrared
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Summary:•We investigated the right prefrontal cortex activation during a dual-task paradigm.•The performance on the arithmetic task decreased when the level of force increased.•Submaximal handgrip tasks increased relatively prefrontal activity.•Motor and mental stimuli do not interact in generating higher prefrontal activation. Functional near-infrared spectroscopy (fNIRS) is suitable for investigating cerebral oxygenation changes during motor and/or mental tasks. In the present study, we investigated how an additional mental load during a motor task at two submaximal loadings affects the fNIRS-measured brain activation over the right prefrontal cortex (PFC). Fifteen healthy males performed isometric grasping contractions at 15% and 30% of the maximal voluntary contraction (MVC) with or without an additional mental (i.e., arithmetic) task. Mental performance, force variability, fNIRS and subjective perception responses were measured in each condition. The performance of the mental task decreased significantly while the force variability increased significantly at 30% MVC as compared to 15% MVC, suggesting that performance of dual-task required more attentional resources. PFC activity increased significantly as the effort increased from 15% to 30% MVC (p
ISSN:0168-0102
1872-8111
DOI:10.1016/j.neures.2013.04.006