MEG-compatible pneumatic stimulator to elicit passive finger and toe movements.

NeuroImage
Harri PiitulainenVeikko Jousmäki

Abstract

Magnetoencephalographic (MEG) signals recorded from the primary sensorimotor (SM1) cortex are coherent with kinematics of both active and passive finger movements. The coherence mainly reflects movement-related proprioceptive afference to the cortex. Here we describe a novel MEG-compatible stimulator to generate computer-controlled passive finger and toe movements that can be used as stimuli in functional brain-imaging experiments. The movements are produced by pneumatic artificial muscle (PAM), elastic actuator that shortens with increasing air pressure. To test the applicability of the stimulator to functional brain-imaging, 4-min trains of passive repetitive 5-mm flexion-extension movements of the right and left index finger and the right hallux were produced at 3Hz while the subject's brain activity was measured with whole-scalp MEG and finger or toe kinematics with an accelerometer. In all ten subjects studied, statistically significant coherence (up to 0.78) occurred between the accelerometer and MEG signals at the movement frequency or its first harmonic. Sources of coherent activity were in the contralateral hand or foot SM1 cortices. Movement-evoked fields elicited with intermittent movements of the right index finger ...Continue Reading

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Citations

Sep 5, 2015·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Mathieu BourguignonDaniel Lundqvist
Nov 3, 2015·Neurophysiologie clinique = Clinical neurophysiology·B MartyX De Tiège
Oct 30, 2016·The European Journal of Neuroscience·Eero SmedsRiitta Hari
Dec 20, 2016·PloS One·Hanna-Leena Halme, Lauri Parkkonen
Feb 7, 2017·Neurorehabilitation and Neural Repair·Eeva ParkkonenNina Forss
Jun 30, 2019·Frontiers in Neurology·Rudolf KreidenhuberStefan Rampp
Dec 19, 2018·Frontiers in Human Neuroscience·Timo NurmiHarri Piitulainen
Jul 3, 2018·Frontiers in Aging Neuroscience·Harri PiitulainenSimon Walker
Sep 5, 2018·Frontiers in Human Neuroscience·Ryoki SasakiHideaki Onishi
Feb 24, 2019·Scientific Reports·Mikkel C VindingDaniel Lundqvist
Nov 10, 2020·Journal of Clinical Neurophysiology : Official Publication of the American Electroencephalographic Society·Xavier De TiègeVeikko Jousmäki
Oct 29, 2020·Journal of Neurophysiology·Harri PiitulainenMathieu Bourguignon
May 7, 2021·The European Journal of Neuroscience·Harri PiitulainenMaria Hakonen
Jul 15, 2021·Journal of Neurophysiology·Toni MujunenHarri Piitulainen

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