MEG corticomuscular coherence

Authors: Raymundo Cassani

Corticomuscular coherence relates to the synchrony between electrophisiological signals (MEG, EEG or ECoG) recorded from the contralateral motor cortex, and EMG signal from a muscle during voluntary movement. This synchrony has its origin mainly in the descending communication in corticospinal pathways between primary motor cortex (M1) and muscles. This tutorial replicates the processing pipeline and analysis presented in the Analysis of corticomuscular coherence FieldTrip tutorial.

== Background == ?Coherence is a classic metric to evaluate the synchrony between two signals. Previous studies (conway 1995, review: https://www.frontiersin.org/articles/10.3389/fnhum.2019.00100/full) have reported the use of coherence to study the connectivity between the primary motor cortex and muscles. The results of such studies, show synchronized activity in the 15–30 Hz range during maintained voluntary contractions. Kilkner 2000

IMAGE OF EXPERIMENT, SIGNALS and COHERENCE

Dataset description

=== License ===

MEG EMG equipment trials duration which ones will be analyzed

Download and installation

You should have Brainstorm Download data from Fieldtrip FTP

Example of performing citations in text, and .

The imaginary coherence (Nolte et al., 2004), commonly found as: .

Importing anatomy data

1. Create protocol 1.

Access the recordings

1. How to link the MEG recordings

Handle events

Fusion all the left events

Pre-process recordings

Removing artifacts

Importing the recordings

Epoching

Source analysis

Coherence

Sensor level

Source level

Script

This should be label as advanced.

Additional documentation

Articles

• Minimum norm: Baillet S, Mosher JC, Leahy RM
  Electromagnetic brain mapping, IEEE SP MAG 2001.

Tutorials

• Tutorial: Volume source estimation

Forum discussions

• Forum: Minimum norm units (pA.m): http://neuroimage.usc.edu/forums/showthread.php?1246

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