Individual activation patterns after the stimulation of different motor areas-a TMS-EEG study

Brain Connectivity
Karita Suvi-Tuuli SaloRisto J Ilmoniemi

Abstract

The combination of transcranial magnetic stimulation (TMS) and electroencephalography (EEG) enables one to study effective connectivity and activation order in neuronal networks. To characterize effective connectivity originating from the primary motor cortex (M1), dorsal premotor area (PMd), and supplementary motor area (SMA). Three right-handed volunteers (2 males, aged 25-30) participated in a navigated TMS-EEG experiment. M1, PMd, and SMA over the non-dominant hemisphere were stimulated with 150 TMS pulses. Minimum-norm estimates (MNE) were derived from the EEG data to estimate the spatial spreading of TMS-elicited neuronal activation on an individual level. The activation order of the cortical areas varied depending on the stimulated area. There were similarities and differences in the spatial distribution of the TMS-evoked potentials between subjects. The similarities in cortical activation patterns were seen at short post-stimulus latencies and the differences at long latencies. This pilot study suggests that cortical activation patterns and the activation order of motor areas differ inter-individually and depend on the stimulated motor area. It further indicates that TMS-activated effective connections or underlying str...Continue Reading

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Citations

Jul 11, 2019·Brain Topography·Karita S-T SaloRisto J Ilmoniemi
Apr 20, 2019·Frontiers in Neurology·Smadar Ovadia-CaroMaria Nazarova
Nov 27, 2019·Acta neurochirurgica·Andia MirbagheriThomas Picht
Feb 25, 2020·Brain Topography·Jord J T VinkMouhsin M Shafi
Jan 26, 2022·Journal of Neural Transmission·Dominik PizemIrena Rektorova

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Methods Mentioned

BETA
SMA

Software Mentioned

MATLAB
Nexstim
ccPAS
EEGLAB
BrainSuite
SIR
FreeSurfer

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