Abstract：
:During bimanual load lifting, the brain must anticipate the effects of unloading upon the load-bearing arm. Little is currently known about the neural networks that coordinate these anticipatory postural adjustments. We measured neuromagnetic brain activity with whole-head magnetoencephalography while participants performed a bimanual load-lifting task. Anticipatory adjustments were associated with reduction in biceps brachii muscle activity of the load-bearing arm and pre-movement desynchronization of the cortical beta rhythm. Beamforming analyses localized anticipatory brain activity to the precentral gyrus, basal ganglia, supplementary motor area, and thalamus, contralateral to the load-bearing arm. To our knowledge this is the first human neuroimaging study to directly investigate anticipatory postural adjustments and to explicitly partition the anticipatory and volitional aspects of brain activity in bimanual load lifting. These data contribute to our understanding of the neural systems supporting anticipatory postural adjustments in healthy adults.
journal_name
Neuroimagejournal_title
NeuroImageauthors
Ng TH,Sowman PF,Brock J,Johnson BWdoi
10.1016/j.neuroimage.2012.10.042subject
Has Abstractpub_date
2013-02-01 00:00:00pages
343-52eissn
1053-8119issn
1095-9572pii
S1053-8119(12)01045-2journal_volume
66pub_type
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