Developmental Trajectory of Beta Cortical Oscillatory Activity During a Knee Motor Task.
There is currently a void in the scientific literature on the cortical beta oscillatory activity that is associated with the production of leg motor actions. In addition, we have limited data on how these cortical oscillations may progressively change as a function of development. This study began to fill this vast knowledge gap by using high-density magnetoencephalography to quantify the beta cortical oscillatory activity over a cross-section of typically developing children as they performed an isometric knee target matching task. Advanced beamforming methods were used to identify the spatiotemporal changes in beta oscillatory activity during the motor planning and motor action time frames. Our results showed that a widespread beta event-related desynchronization (ERD) was present across the pre/postcentral gyri, supplementary motor area, and the parietal cortices during the motor planning stage. The strength of this beta ERD sharply diminished across this fronto-parietal network as the children initiated the isometric force needed to match the target. Rank order correlations indicated that the older children were more likely to initiate their force production sooner, took less time to match the targets, and tended to have a weaker beta ERD during the motor planning stage. Lastly, we determined that there was a relationship between the child's age and the strength of the beta ERD within the parietal cortices during isometric force production. Altogether our results suggest that there are notable maturational changes during childhood and adolescence in beta cortical oscillatory activity that are associated with the planning and execution of leg motor actions.
Department of Physical Therapy, Munroe-Meyer Institute for Genetics and Rehabilitation, University of Nebraska Medical Center, 68198-5450, Omaha, NE, USA. mkurz@unmc.edu.|Center for Magnetoencephalography, University of Nebraska Medical Center, Omaha, NE, USA. mkurz@unmc.edu.
Max J
MJ
Kurz
Center for Magnetoencephalography, University of Nebraska Medical Center, Omaha, NE, USA.|Department of Psychology, University of Nebraska - Omaha, Omaha, NE, USA.
Amy L
AL
Proskovec
Department of Physical Therapy, Munroe-Meyer Institute for Genetics and Rehabilitation, University of Nebraska Medical Center, 68198-5450, Omaha, NE, USA.|Center for Magnetoencephalography, University of Nebraska Medical Center, Omaha, NE, USA.
James E
JE
Gehringer
Center for Magnetoencephalography, University of Nebraska Medical Center, Omaha, NE, USA.
Katherine M
KM
Becker
Department of Physical Therapy, Munroe-Meyer Institute for Genetics and Rehabilitation, University of Nebraska Medical Center, 68198-5450, Omaha, NE, USA.|Center for Magnetoencephalography, University of Nebraska Medical Center, Omaha, NE, USA.
David J
DJ
Arpin
Center for Magnetoencephalography, University of Nebraska Medical Center, Omaha, NE, USA.
Elizabeth
E
Heinrichs-Graham
Center for Magnetoencephalography, University of Nebraska Medical Center, Omaha, NE, USA.|Pharmacology and Experimental Neuroscience, College of Medicine, University of Nebraska Medical Center, Omaha, NE, USA.|Department of Neurological Sciences, College of Medicine, University of Nebraska Medical Center, Omaha, NE, USA.
Tony W
TW
Wilson
D000293:Adolescent; D041923:Adolescent Development / Q000502:physiology*; D001611:Beta Rhythm / Q000502:physiology*; D002540:Cerebral Cortex / Q000502:physiology*; D002648:Child; D002657:Child Development / Q000502:physiology*; D003344:Cortical Synchronization / Q000502:physiology*; D005260:Female; D006801:Humans; D015225:Magnetoencephalography; D008297:Male; D009043:Motor Activity / Q000502:physiology*; D009044:Motor Cortex / Q000502:physiology*; D009068:Movement; D066191:Sensorimotor Cortex / Q000502:physiology
Children; Leg; Magnetoencephalography; Parietal; Sensorimotor