MEG insight into the spectral dynamics underlying steady isometric muscle contraction
| Autor: | Riitta Hari, Eero Smeds, Veikko Jousmäki, Mathieu Bourguignon, Harri Piitulainen, Guangyu Zhou |
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| Přispěvatelé: | Lee Kong Chian School of Medicine (LKCMedicine), Cognitive Neuroimaging Centre, Department of Neuroscience and Biomedical Engineering, Department of Art, Aalto-yliopisto, Aalto University |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
magnetoencephalography
0301 basic medicine Male Sensorimotor Cortex -- physiology Efferent Isometric exercise 0302 clinical medicine Systems/Circuits Feedback Sensory motor control Muscle Skeletal -- physiology coticokinematic coherence Research Articles MEG Hand Strength medicine.diagnostic_test General Neuroscience Photic Stimulation -- methods Cortex-muscle coherence Magnetoencephalography Human brain Neurofeedback Middle Aged medicine.anatomical_structure corticokinematic coherence Female Sensorimotor Cortex Psychology Corticokinematic coherence Adult Magnetoencephalography -- methods Isometric contraction isometric contraction 03 medical and health sciences Young Adult Primary sensorimotor cortex Hand Strength -- physiology primary sensorimotor cortex Isometric Contraction -- physiology Motor control medicine Humans Muscle Skeletal cortex–muscle coherence Neurofeedback -- methods Proprioception Feedback Sensory -- physiology Neurosciences cognitives Neurophysiology 030104 developmental biology Sensorimotor rhythm cortex-muscle coherence Neuroscience Photic Stimulation 030217 neurology & neurosurgery |
| Zdroj: | The Journal of neuroscience, 37 (43 The Journal of Neuroscience Addi. Archivo Digital para la Docencia y la Investigación instname |
| Popis: | To gain fundamental knowledge on how the brain controls motor actions, we studied in detail the interplay between MEG signals from the primary sensorimotor (SM1) cortex and the contraction force of 17 healthy adult humans (7 females, 10 males). SM1 activity was coherent at ~20 Hz with surface electromyogram (as already extensively reported) but also with contraction force. In both cases, the effective coupling was dominant in the efferent direction. Across subjects, the level of ~20 Hz coherence between cortex and periphery positively correlated with the “burstiness” of ~20 Hz SM1 (Pearson r ≈ 0.65) and peripheral fluctuations (r ≈ 0.9). Thus, ~20 Hz coherence between cortex and periphery is tightly linked to the presence of ~20 Hz bursts in SM1 and peripheral activity. However, the very high correlation with peripheral fluctuations suggests that the periphery is the limiting factor. At frequencies SCOPUS: ar.j info:eu-repo/semantics/published |
| Databáze: | OpenAIRE |
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