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The developmental trajectory of sensorimotor cortical oscillations
Michael P Trevarrow1, Max J Kurz1, Timothy J McDermott2
1Department of Physical Therapy, Munroe Meyer Institute for Genetics and Rehabilitation, University of Nebraska Medical Center, Omaha, NE, USA; Center for Magnetoencephalography, University of Nebraska Medical Center, Omaha, NE, USA.
Neuroimage
|September 16, 2018
Summary
Motor cortex oscillations, including beta decreases and post-movement beta rebound (PMBR), mature through adolescence. Gamma synchronization strength decreases with age in developing brains.
Area of Science:
- Neuroscience
- Developmental Neuroscience
- Motor Control
Background:
- Motor control studies confirm beta and gamma oscillations in primary motor cortices during basic movements.
- Established responses include beta decrease, transient gamma response, and post-movement beta rebound (PMBR).
- Developmental trajectories of these sensorimotor oscillations are under-examined.
Purpose of the Study:
- Investigate age-related changes in sensorimotor cortical oscillations in children and adolescents.
- Examine the developmental trajectory of beta and gamma oscillations during motor tasks.
- Determine if motor-related oscillatory responses mature into adolescence.
Main Methods:
- Utilized magnetoencephalography (MEG) on 94 participants aged 9-15 years.
- Participants performed a stimulus detection task with their right finger.
- MEG data analyzed using oscillatory analysis and imaged with a beamformer.
Main Results:
- Youth exhibited characteristic beta decreases, PMBR, and transient gamma responses, consistent with adult findings.
- The strength of the PMBR significantly increased with age.
- The strength of gamma synchronization significantly decreased with chronological age.
Conclusions:
- Beta and gamma cortical oscillations continue to develop throughout childhood and adolescence.
- These motor-related oscillatory responses may not reach full maturity until young to middle adulthood.
- The study provides insights into the maturation of sensorimotor networks in a large pediatric cohort.
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