Maarten R C van den Heuvel1, Erwin E H van Wegen2, Peter J Beek3, Gert Kwakkel4, Andreas Daffertshofer5. 1. Department of Human Movement Sciences, Faculty of Behavioural and Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, van der Boechorststraat 9, 1081 BT Amsterdam, The Netherlands; Department of Movement Science, Westfälische Wilhelms-Universität Münster, Horstmarer Landweg 62b, D-48149 Münster, Germany. Electronic address: heuvelm@wwu.de. 2. Department of Human Movement Sciences, Faculty of Behavioural and Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, van der Boechorststraat 9, 1081 BT Amsterdam, The Netherlands; Department of Rehabilitation Medicine, VU University Medical Center, Amsterdam Movement Sciences, De Boelelaan 1118, 1007 MB Amsterdam, The Netherlands. Electronic address: e.vanwegen@vumc.nl. 3. Department of Human Movement Sciences, Faculty of Behavioural and Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, van der Boechorststraat 9, 1081 BT Amsterdam, The Netherlands. Electronic address: p.j.beek@vu.nl. 4. Department of Human Movement Sciences, Faculty of Behavioural and Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, van der Boechorststraat 9, 1081 BT Amsterdam, The Netherlands; Department of Rehabilitation Medicine, VU University Medical Center, Amsterdam Movement Sciences, De Boelelaan 1118, 1007 MB Amsterdam, The Netherlands; Department of Neurorehabilitation, Reade Center for Rehabilitation and Rheumatology, Overtoom 283, Amsterdam, The Netherlands; Amsterdam Neuroscience, VU University Medical Centre Amsterdam, The Netherlands; Department of Physical Therapy and Human Movement Sciences, Northwestern University, IL, USA. Electronic address: g.kwakkel@vumc.nl. 5. Department of Human Movement Sciences, Faculty of Behavioural and Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, van der Boechorststraat 9, 1081 BT Amsterdam, The Netherlands. Electronic address: a.daffertshofer@vu.nl.
Abstract
OBJECTIVE: In patients with Parkinson's disease (PD), augmented visual feedback (VF) can improve functional motor performance. Conversely, they appear to rely more on visual information than healthy subjects, which is unfavorable when this information is unreliable. Cortical beta activity is thought to be associated with the need for motor adaptation. We here compared event-related EEG parameters during a whole-body postural weight-shifting task between congruent and incongruent feedback conditions. METHODS:Twenty-four patients with PD and fifteen healthy, age- and gender-matched controls performed rhythmic swaying movements. VF was presented in real-time (congruent), delayed (incongruent), or was entirely absent. We estimated source activity in four regions-of-interest and determined motor-related spectral power and power modulation in alpha and beta frequency bands. RESULTS: For congruent VF no significant differences in cortical activity between the two groups were present. For incongruent VF, the PD group showed significantly higher beta modulation in primary motor cortex, and higher alpha modulation in primary visual cortex. CONCLUSIONS: Event-related beta modulation in the motor network and alpha modulation in visual areas discriminated between groups, suggesting altered visuomotor processing in PD patients. SIGNIFICANCE: This study finds evidence for increased modulation of alpha/beta activity during perceptual-motor tasks in PD, possibly indicating an unwarranted higher confidence in VF.
RCT Entities:
OBJECTIVE: In patients with Parkinson's disease (PD), augmented visual feedback (VF) can improve functional motor performance. Conversely, they appear to rely more on visual information than healthy subjects, which is unfavorable when this information is unreliable. Cortical beta activity is thought to be associated with the need for motor adaptation. We here compared event-related EEG parameters during a whole-body postural weight-shifting task between congruent and incongruent feedback conditions. METHODS: Twenty-four patients with PD and fifteen healthy, age- and gender-matched controls performed rhythmic swaying movements. VF was presented in real-time (congruent), delayed (incongruent), or was entirely absent. We estimated source activity in four regions-of-interest and determined motor-related spectral power and power modulation in alpha and beta frequency bands. RESULTS: For congruent VF no significant differences in cortical activity between the two groups were present. For incongruent VF, the PD group showed significantly higher beta modulation in primary motor cortex, and higher alpha modulation in primary visual cortex. CONCLUSIONS: Event-related beta modulation in the motor network and alpha modulation in visual areas discriminated between groups, suggesting altered visuomotor processing in PDpatients. SIGNIFICANCE: This study finds evidence for increased modulation of alpha/beta activity during perceptual-motor tasks in PD, possibly indicating an unwarranted higher confidence in VF.