Improvement in precision grip force control with self-modulation of primary motor cortex during motor imagery

Frontiers in Behavioral Neuroscience
Maria L BlefariRoger Gassert

Abstract

Motor imagery (MI) has shown effectiveness in enhancing motor performance. This may be due to the common neural mechanisms underlying MI and motor execution (ME). The main region of the ME network, the primary motor cortex (M1), has been consistently linked to motor performance. However, the activation of M1 during motor imagery is controversial, which may account for inconsistent rehabilitation therapy outcomes using MI. Here, we examined the relationship between contralateral M1 (cM1) activation during MI and changes in sensorimotor performance. To aid cM1 activity modulation during MI, we used real-time fMRI neurofeedback-guided MI based on cM1 hand area blood oxygen level dependent (BOLD) signal in healthy subjects, performing kinesthetic MI of pinching. We used multiple regression analysis to examine the correlation between cM1 BOLD signal and changes in motor performance during an isometric pinching task of those subjects who were able to activate cM1 during motor imagery. Activities in premotor and parietal regions were used as covariates. We found that cM1 activity was positively correlated to improvements in accuracy as well as overall performance improvements, whereas other regions in the sensorimotor network were not...Continue Reading

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Citations

Dec 27, 2015·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·Robert T ThibaultAmir Raz
Jan 7, 2016·Frontiers in Behavioral Neuroscience·Theo F MarinsFernanda Tovar-Moll
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Apr 1, 2021·Journal of Neurophysiology·Ethan OblakJames Sulzer
Aug 17, 2021·Medical & Biological Engineering & Computing·Anna J SosnowskaHenrik Gollee

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Methods Mentioned

BETA
SMA

Software Mentioned

Brain Voyager QX
SPSS
Microsoft Visual Studio
Turbo
Matlab
rtfMRI
Imagine
BrainVoyager

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