Effects of longer vs. shorter timed movement sequences on alpha motor inhibition when combining contractions and relaxations
| Autor: | Nils Flüthmann, Kazyuki Kanosue, Tobias Vogt, Kouki Kato, Oliver Bloch |
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| Rok vydání: | 2018 |
| Předmět: |
Adult
Male medicine.medical_specialty Time Factors Movement medicine.medical_treatment Alpha (ethology) Muscle Strength Dynamometer Isometric exercise Electroencephalography Inhibitory postsynaptic potential Statistics Nonparametric 050105 experimental psychology Young Adult 03 medical and health sciences 0302 clinical medicine Physical medicine and rehabilitation Humans Medicine 0501 psychology and cognitive sciences Progressive muscle relaxation Fourier Analysis Relaxation (psychology) medicine.diagnostic_test Electromyography business.industry General Neuroscience 05 social sciences Neural Inhibition Muscle activation Alpha Rhythm Motor task Torque Female business Psychomotor Performance 030217 neurology & neurosurgery Muscle Contraction |
| Zdroj: | Experimental Brain Research. 237:101-109 |
| ISSN: | 1432-1106 0014-4819 |
| DOI: | 10.1007/s00221-018-5401-5 |
| Popis: | Alpha inhibitory processes reflect motor stimuli by either increasing or decreasing amplitude (i.e., power). However, the functional role and interplay of event-related alpha oscillations remains a regulatory domain that has not been sufficiently addressed, particularly with respect to different muscle activation types and durations in consecutive movement (i.e., motor) tasks. The aim of this study was to investigate alpha-band activity (7–13 Hz) in longer vs. shorter timed isometric muscle activations at distinct torques (20% and 40% of maximum voluntary contraction, MVC) when combined in one motor task sequence. In a randomized and controlled design, 18 healthy males volunteered to perform 40 longer (i.e., 6 s) and 40 shorter (i.e., 3 s) motor task sequences, each comprising isometric contractions (i.e., palmar flexion) from baseline to 20% and 40% MVC subsequent to relaxations from 40% and 20% MVC to baseline. Continuous, synchronized EEG, EMG and torque recordings served to determine alpha-band activity over task-relevant motor areas at distinct torques. Main findings revealed increases in alpha activity during subsequent progressive muscle relaxation (from 20% MVC in long and short: p |
| Databáze: | OpenAIRE |
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