Changes in interhemispheric motor connectivity after muscle fatigue

Scott Peltier; Stephen M. LaConte; Dmitriy Niyazov; Jing Liu; Vinod Sahgal; Guang Yue; Xiaoping Hu

doi:10.1117/12.595628

14 April 2005 Changes in interhemispheric motor connectivity after muscle fatigue (Cum Laude Poster Award)

Scott Peltier, Stephen M. LaConte, Dmitriy Niyazov, Jing Liu, Vinod Sahgal, Guang Yue, Xiaoping Hu

Proceedings Volume 5746, Medical Imaging 2005: Physiology, Function, and Structure from Medical Images; (2005) https://doi.org/10.1117/12.595628
Event: Medical Imaging, 2005, San Diego, California, United States

Abstract

Synchronized oscillations in resting state timecourses have been detected in recent fMRI studies. These oscillations are low frequency in nature (< 0.08 Hz), and seem to be a property of symmetric cortices. These fluctuations are important as a potential signal of interest, which could indicate connectivity between functionally related areas of the brain. It has also been shown that the synchronized oscillations decrease in some spontaneous pathological states. Thus, detection of these functional connectivity patterns may help to serve as a gauge of normal brain activity. The cognitive effects of muscle fatigue are not well characterized. Sustained fatigue has the potential to dynamically alter activity in brain networks. In this work, we examined the interhemispheric correlations in the left and right primary motor cortices and how they change with muscle fatigue. Resting-state functional MRI imaging was done before and after a repetitive unilateral fatigue task. We find that the number of significant correlations in the bilateral motor network decreases with fatigue. These results suggest that resting-state interhemispheric motor cortex functional connectivity is affected by muscle fatigue.

Citation Download Citation

Scott Peltier, Stephen M. LaConte, Dmitriy Niyazov, Jing Liu, Vinod Sahgal, Guang Yue, and Xiaoping Hu "Changes in interhemispheric motor connectivity after muscle fatigue (Cum Laude Poster Award)", Proc. SPIE 5746, Medical Imaging 2005: Physiology, Function, and Structure from Medical Images, (14 April 2005); https://doi.org/10.1117/12.595628

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