Cerebral cortex activation mapping upon electrical muscle stimulation by 32-channel time-domain functional near-infrared spectroscopy
Re, Rebecca, Muthalib, Makii, Contini, Davide, Zucchelli, Lucia, Torricelli, Alesandron, Spinelli, Lorenzo, Caffini, Matteo, Ferrari, Marco, Quaresima, Valentina, Perrey, Stephane, & Kerr, Graham K. (2013) Cerebral cortex activation mapping upon electrical muscle stimulation by 32-channel time-domain functional near-infrared spectroscopy. In Van Huffel, S., Naulaers, G., Caicedo, A., Bruley, D.F., & Harrison, D.K. (Eds.) Oxygen Transport to Tissue XXXV. Springer, pp. 441-447.
The application of different EMS current thresholds on muscle activates not only the muscle but also peripheral sensory axons that send proprioceptive and pain signals to the cerebral cortex. A 32-channel time-domain fNIRS instrument was employed to map regional cortical activities under varied EMS current intensities applied on the right wrist extensor muscle. Eight healthy volunteers underwent four EMS at different current thresholds based on their individual maximal tolerated intensity (MTI), i.e., 10 % < 50 % < 100 % < over 100 % MTI. Time courses of the absolute oxygenated and deoxygenated hemoglobin concentrations primarily over the bilateral sensorimotor cortical (SMC) regions were extrapolated, and cortical activation maps were determined by general linear model using the NIRS-SPM software. The stimulation-induced wrist extension paradigm significantly increased activation of the contralateral SMC region according to the EMS intensities, while the ipsilateral SMC region showed no significant changes. This could be due in part to a nociceptive response to the higher EMS current intensities and result also from increased sensorimotor integration in these cortical regions.
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|Item Type:||Book Chapter|
|Additional Information:||A Special Issue of "Advances in Experimental Medicine and Biology"|
|Keywords:||Functional near-infrared spectroscopy, muscle stimulation, cerebral cortex activation|
|Subjects:||Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > HUMAN MOVEMENT AND SPORTS SCIENCE (110600) > Motor Control (110603)
Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > NEUROSCIENCES (110900) > Central Nervous System (110903)
|Divisions:||Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Current > Schools > School of Exercise & Nutrition Sciences
|Copyright Owner:||Copyright 2013 Springer Science+Business Media|
|Deposited On:||23 Jul 2013 22:35|
|Last Modified:||22 Apr 2016 01:52|
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