Reference : Subthalamic nucleus stimulation restores the efferent cortical drive to muscle in par...
Scientific journals : Article
Life sciences : Genetics & genetic processes
Subthalamic nucleus stimulation restores the efferent cortical drive to muscle in parallel to functional motor improvement.
Weiss, Daniel [> >]
Breit, Sorin [> >]
Hoppe, Julia [> >]
Hauser, Ann-Kathrin [> >]
Freudenstein, Dirk [> >]
Krüger, Rejko mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Life Science Research Unit]
Sauseng, Paul [> >]
Govindan, Rathinaswamy B. [> >]
Gerloff, Christian [> >]
The European journal of neuroscience
Yes (verified by ORBilu)
[en] Aged ; Cortical Synchronization/physiology ; Deep Brain Stimulation ; Female ; Humans ; Male ; Middle Aged ; Motor Cortex/physiopathology ; Muscle, Skeletal/innervation ; Parkinson Disease/physiopathology/therapy ; Psychomotor Performance/physiology ; Signal Processing, Computer-Assisted ; Subthalamic Nucleus/physiopathology
[en] Pathological synchronization in large-scale motor networks constitutes a pathophysiological hallmark of Parkinson's disease (PD). Corticomuscular synchronization in PD is pronounced in lower frequency bands (< 10 Hz), whereas efficient cortical motor integration in healthy persons is driven in the beta frequency range. Electroencephalogram and electromyogram recordings at rest and during an isometric precision grip task were performed in four perioperative sessions in 10 patients with PD undergoing subthalamic nucleus deep-brain stimulation: (i) 1 day before (D0); (ii) 1 day after (D1); (iii) 8 days after implantation of macroelectrodes with stimulation off (D8StimOff); and (iv) on (D8StimOn). Analyses of coherence and phase delays were performed in order to challenge the effects of microlesion and stimulation on corticomuscular coherence (CMC). Additionally, local field potentials recorded from the subthalamic nucleus on D1 allowed comprehensive mapping of motor-related synchronization in subthalamocortical and cerebromuscular networks. Motor performance improved at D8StimOn compared with D0 and D8StimOff paralleled by a reduction of muscular activity and CMC in the theta band (3.9-7.8 Hz) and by an increase of CMC in the low-beta band (13.7-19.5 Hz). Efferent motor cortical drives to muscle presented mainly below 10 Hz on D8StimOff that were suppressed on D8StimOn and occurred on higher frequencies from 13 to 45 Hz. On D1, coherence of the high-beta band (20.5-30.2 Hz) increased during movement compared with rest in subthalamomuscular and corticomuscular projections, whereas it was attenuated in subcorticocortical projections. The present findings lend further support to the concept of pathological network synchronization in PD that is beneficially modulated by stimulation.
Luxembourg Centre for Systems Biomedicine (LCSB): Clinical & Experimental Neuroscience (Krüger Group)
(c) 2012 The Authors. European Journal of Neuroscience (c) 2012 Federation of European Neuroscience Societies and Blackwell Publishing Ltd.

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