Effects of force–load on cortical activity preceding voluntary finger movement: Whole-scalp magnetoencephalography of the Bereitschaftsfeld

Cui, Rongqing, Cunnington, Ross, Beisteiner, Roland and Deecke, Luder (2012) Effects of force–load on cortical activity preceding voluntary finger movement: Whole-scalp magnetoencephalography of the Bereitschaftsfeld. Neurology, Psychiatry and Brain Research, 18 3: 97-104. doi:10.1016/j.npbr.2012.03.001


Author Cui, Rongqing
Cunnington, Ross
Beisteiner, Roland
Deecke, Luder
Title Effects of force–load on cortical activity preceding voluntary finger movement: Whole-scalp magnetoencephalography of the Bereitschaftsfeld
Journal name Neurology, Psychiatry and Brain Research   Check publisher's open access policy
ISSN 0941-9500
2212-8581
Publication date 2012-06
Sub-type Article (original research)
DOI 10.1016/j.npbr.2012.03.001
Volume 18
Issue 3
Start page 97
End page 104
Total pages 8
Place of publication Jena, Germany
Publisher Urban und Fischer
Collection year 2013
Language eng
Formatted abstract
Neural activityprecedingforce-loaded voluntaryfinger movement (the Bereitschaftsfeld) was recorded using 143-channel whole-scalpmagnetoencephalography (MEG) in order to determine how the level of force produced during voluntaryfinger movement is represented in activity over different premovement time intervals localized to different cortical areas. Eighteen healthy subjects performed voluntary right index-finger extension movements against an inertial load of either 0, 100, or 200 g. Results showed that the earliest component of premovement activity, beginning between 1.5 and 1.0 s prior to movement and localized to the central midline around the region of supplementary/cingulate motor areas, was not modulated by the level of force required for movement. However, later premovement activity, occurring between 500 and 200 ms prior to movement onset, was significantly greater for the highest force movements compared with both intermediate (p < 0.05) and no weight-load conditions (p < 0.01). This component was localized to primary sensorimotor cortical areas, with greater source strength on the left side contralateral to movement. Results indicate that, although early premovement activity of the supplementary/cingulate motor areas does not appear to encode movement force, later premovement activity of the primary motor cortex is significantly greater for movements made with more force, not only during movement execution but also up to 500 ms prior in readiness for intended movements of greater force.
Keyword Magnetoencephalography (MEG)
Bereitschaftsfeld (BF)
Force-loaded movement
Supplementary/cingulate motor
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Queensland Brain Institute Publications
Official 2013 Collection
School of Psychology Publications
 
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Created: Mon, 09 Jul 2012, 15:39:03 EST by Debra McMurtrie on behalf of Queensland Brain Institute