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Brain State-dependent Brain Stimulation with Real-time Electroencephalography-Triggered Transcranial Magnetic Stimulation
Published on: August 20, 2019
Spatiotemporal tuning of brain activity and force performance
Stephen A Coombes1, Daniel M Corcos, David E Vaillancourt
1Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, IL 60612, USA. scoombes@uic.edu
Neuroimage
|October 13, 2010
Summary
Visual feedback frequency impacts brain activity during motor control. Higher frequencies engage visuomotor areas, while lower frequencies recruit striatal-frontal circuits for improved force performance.
Area of Science:
- Neuroscience
- Motor Control
- Visual Processing
Background:
- Spatiotemporal features of visual stimuli influence motor performance.
- The neural processing of visual-motor integration beyond the visual cortex is not fully understood.
Purpose of the Study:
- To investigate how brain activity and force control are modulated by visual gain at different visual feedback frequencies.
- To determine the brain regions involved in processing visual gain for motor tasks at high (6.4 Hz) and low (0.4 Hz) feedback rates.
Main Methods:
- Functional magnetic resonance imaging (fMRI) was employed to measure brain activity.
- Participants' force control performance was assessed under varying visual gain conditions and feedback frequencies.
Main Results:
- At 6.4 Hz, increased visual gain improved force performance and activated visuomotor areas (V5, IPL, SPL, PMv, SMA-proper, M1).
- At 0.4 Hz, increased visual gain also improved force performance, with activation in visuomotor areas (M1/PMd, IPL) and the striatal-frontal circuit (DLPFC, ACC, putamen, caudate, SMA-proper).
Conclusions:
- The frequency of visual feedback dictates the neural pathways through which visual gain influences force error reduction.
- Different brain circuits are recruited for visuomotor control depending on the temporal characteristics of visual information.
