title: Alpha and beta band event-related desynchronization reflects kinematic regularities.
abstract: The short-lasting attenuation of brain oscillations is termed event-related desynchronization (ERD). It is frequently found in the alpha and beta bands in humans during generation, observation, and imagery of movement and is considered to reflect cortical motor activity and action-perception coupling. The shared information driving ERD in all these motor-related behaviors is unknown. We investigated whether particular laws governing production and perception of curved movement may account for the attenuation of alpha and beta rhythms. Human movement appears to be governed by relatively few kinematic laws of motion. One dominant law in biological motion kinematics is the 2/3 power law (PL), which imposes a strong dependency of movement speed on curvature and is prominent in action-perception coupling. Here we directly examined whether the 2/3 PL elicits ERD during motion observation by characterizing the spatiotemporal signature of ERD. ERDs were measured while human subjects observed a cloud of dots moving along elliptical trajectories either complying with or violating the 2/3 PL. We found that ERD within both frequency bands was consistently stronger, arose faster, and was more widespread while observing motion obeying the 2/3 PL. An activity pattern showing clear 2/3 PL preference and lying within the alpha band was observed exclusively above central motor areas, whereas 2/3 PL preference in the beta band was observed in additional prefrontal-central cortical sites. Our findings reveal that compliance with the 2/3 PL is sufficient to elicit a selective ERD response in the human brain.
authors: Department of Computer Science and Applied Mathematics, Weizmann Institute of Science, Rehovot 76100, Israel, yaron.mr@gmail.com.
authors: Yaron
authors: Y
authors: Meirovitch
authors: Department of Neurobiology/Brain Research, Weizmann Institute of Science, Rehovot 76100, Israel, and.
authors: Hila
authors: H
authors: Harris
authors: Human Cortical Physiology and Stroke Neurorehabilitation Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland 20892-1428.
authors: Eran
authors: http://orcid.org/0000-0001-9710-9210
authors: E
authors: Dayan
authors: Department of Neurobiology/Brain Research, Weizmann Institute of Science, Rehovot 76100, Israel, and.
authors: Amos
authors: A
authors: Arieli
authors: Department of Computer Science and Applied Mathematics, Weizmann Institute of Science, Rehovot 76100, Israel.
authors: Tamar
authors: T
authors: Flash
mesh_terms: D000328:Adult; D000513:Alpha Rhythm / Q000502:physiology*; D001611:Beta Rhythm / Q000502:physiology*; D001696:Biomechanical Phenomena; D001931:Brain Mapping; D016000:Cluster Analysis; D004569:Electroencephalography; D005260:Female; D006801:Humans; D008297:Male; D009039:Motion Perception / Q000502:physiology; D010775:Photic Stimulation; D013997:Time Factors; D055815:Young Adult
keywords: 2/3 power law; action-perception coupling; biological motion; event-related desynchronization; motion perception; movement kinematics
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