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Related Experiment Video

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Functional Near Infrared Spectroscopy of the Sensory and Motor Brain Regions with Simultaneous Kinematic and EMG Monitoring During Motor Tasks
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Enhanced Brain Network Activity in Complex Movement Rhythms: A Simultaneous Functional Magnetic Resonance Imaging and

Bhim M Adhikari1,2, Charles M Epstein3, Mukesh Dhamala1,4,5,6,7

  • 11 Department of Physics and Astronomy, Georgia State University , Atlanta, Georgia .

Brain Connectivity
|December 12, 2017
PubMed
Summary
This summary is machine-generated.

Movement rhythm complexity involves motor cortex and cerebellum networks. Beta band brainwave activity in the supplementary motor area and primary motor cortex shows complex rhythmic interactions.

Keywords:
Granger causalitydirected connectivityinformation flowrhythmic finger tappingsensorimotor

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Area of Science:

  • Neuroscience
  • Motor Control
  • Brain Networks

Background:

  • Movement rhythm generation engages distributed brain regions for motor planning, control, execution, and timing perception.
  • The specific brain areas involved and how network activity changes with rhythmic complexity remain incompletely understood.

Purpose of the Study:

  • To investigate the neural network underlying movement rhythm complexity.
  • To explore how rhythmic complexity modulates brain activity and interactions.

Main Methods:

  • Simultaneous functional magnetic resonance imaging (fMRI) and electroencephalography (EEG) recordings were used.
  • Nine healthy participants performed simple to complex rhythmic finger movements during fMRI-EEG.

Main Results:

  • fMRI revealed rhythm complexity correlated with activations in the primary motor cortex (PMC), supplementary motor area (SMA), and cerebellum (Cb), and cortical-cerebellar network interactions.
  • EEG spectral analysis showed bidirectional interactions between PMC and SMA.
  • Rhythmic complexity was associated with power and Granger causality spectra in the beta (13-30 Hz) band, but not alpha or gamma bands.

Conclusions:

  • Movement rhythm complexity is associated with specific cortical and cerebellar activations and interactions.
  • Beta band oscillations play a crucial role in modulating neural activity related to movement rhythm complexity between PMC and SMA.