Manual dexterity: Functional lateralisation patterns and motor efficiency

•The EEG study examines visually-driven movements in left- and right-handers.•Distinct functional connectivity within and across hemispheres in both groups.•Behavioural efficiency depends on left-sided circuitry, independent of handedness.•Handedness selectively modulates the regulation of neural pr...

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Bibliographic Details
Published in:Brain and cognition 2016-10, Vol.108, p.42-46
Main Authors: Serrien, Deborah J., Sovijärvi-Spapé, Michiel M.
Format: Article
Language:English
Subjects:
Adult
Brain - physiology
EEG
Electroencephalography
Female
Functional connectivity
Functional Laterality - physiology
Hand - physiology
Handedness
Humans
Male
Motor Activity - physiology
Motor control
Young Adult
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Summary:•The EEG study examines visually-driven movements in left- and right-handers.•Distinct functional connectivity within and across hemispheres in both groups.•Behavioural efficiency depends on left-sided circuitry, independent of handedness.•Handedness selectively modulates the regulation of neural processing mechanisms. Manual tasks are an important goal-directed ability. In this EEG work, we studied how handedness affects the hemispheric lateralisation patterns during performance of visually-driven movements with either hand. The neural correlates were assessed by means of EEG coherence whereas behavioural output was measured by motor error. The EEG data indicated that left- and right-handers showed distinct recruitment patterns. These involved local interactions between brain regions as well as more widespread associations between brain systems. Despite these differences, brain-behaviour correlations highlighted that motor efficiency depended on left-sided brain regions across groups. These results suggest that skilled hand motor control relies on different neural patterns as a function of handedness whereas behavioural efficiency is linked with the left hemisphere. In conclusion, the present findings add to our understanding about principles of lateralised organisation as a function of handedness.
ISSN:0278-2626
1090-2147
DOI:10.1016/j.bandc.2016.07.005