Cortical Correlates of Human Balance Control
| Autor: | Britta Pester, Andreas Mierau, Heiko K. Strüder, Thorben Hülsdünker, Karin Schiecke, Herbert Witte |
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| Rok vydání: | 2017 |
| Předmět: |
Adult
Male Posture Alpha (ethology) Posterior parietal cortex Electroencephalography Working hypothesis 050105 experimental psychology Young Adult 03 medical and health sciences Directed functional connectivity 0302 clinical medicine medicine Humans 0501 psychology and cognitive sciences Radiology Nuclear Medicine and imaging EEG Theta Rhythm Set (psychology) Control (linguistics) Postural Balance Balance (ability) Cerebral Cortex Original Paper Brain Mapping Radiological and Ultrasound Technology medicine.diagnostic_test Functional connectivity 05 social sciences Partial directed coherence Brain Alpha Rhythm Neurology Neurology (clinical) Anatomy Psychology Neuroscience 030217 neurology & neurosurgery |
| Zdroj: | Brain Topography |
| ISSN: | 1573-6792 0896-0267 |
| Popis: | Balance control is a fundamental component of human every day motor activities such as standing or walking, and its impairment is associated with an increased risk of falling. However, in humans the exact neurobiological mechanisms underlying balance control are still unclear. Specifically, although previous studies have identified a number of cortical regions that become significantly activated during real or imagined balancing, the interactions within and between the relevant cortical regions remain to be investigated. The working hypothesis of this study is that cortical networks contribute to an optimization of balance control, and that this contribution can be revealed by partial directed coherence—a time-variant, frequency-selective and directed functional connectivity analysis tool. Electroencephalographic activity was recorded in 37 subjects during single-leg balancing on a stable as well as an unstable surface. Results of this study show that in the transition from balancing on a stable surface to an unstable surface, two topographically delimitable connectivity networks (weighted directed networks) are established; one associated with the alpha and one with the theta frequency band. The theta network sequence can be described as a set of subnetworks (modules) comprising the frontal, central and parietal cortex with individual temporal and spatial developments within and between those modules. In the alpha network, the occipital electrodes O1 and O2 act as a source, and the interactions propagate predominantly in the directions from occipital to parietal and to centro-parietal areas. These important findings indicate that balance control is supported by at least two functional cortical networks. Electronic supplementary material The online version of this article (doi:10.1007/s10548-017-0567-x) contains supplementary material, which is available to authorized users. |
| Databáze: | OpenAIRE |
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