MEEGkit

Denoising tools for M/EEG processing in Python 3.8+.

Disclaimer: The project mostly consists of development code, although some modules and functions are already working. Bugs and performance problems are to be expected, so use at your own risk. More tests and improvements will be added in the future. Comments and suggestions are welcome.

Documentation

Automatic documentation is available online.

This code can also be tested directly from your browser using Binder, by clicking on the binder badge above.

Installation

This package can be installed easily using pip:

bash pip install meegkit

Or you can clone this repository and run the following commands inside the python-meegkit directory:

bash pip install -r requirements.txt pip install .

Note : Use developer mode with the -e flag (pip install -e .) to be able to modify the sources even after install.

Advanced installation instructions

Some ASR variants require additional dependencies such as pymanopt. To install meegkit with these optional packages, use:

bash pip install -e '.[extra]'

or:

bash pip install meegkit[extra]

Other available options are [docs] (which installs dependencies required to build the documentation), or [tests] (which install dependencies to run unit tests).

References

If you use this code, you should cite the relevant methods from the original articles.

1. CCA, STAR, SNS, DSS, ZapLine, and Robust Detrending

This is mostly a translation of Matlab code from the NoiseTools toolbox by Alain de Cheveign. It builds on an initial python implementation by Pedro Alcocer.

Only CCA, SNS, DSS, STAR, ZapLine and robust detrending have been properly tested so far. TSCPA may give inaccurate results due to insufficient testing (contributions welcome!)

sql [1] de Cheveign, A. (2019). ZapLine: A simple and effective method to remove power line artifacts. NeuroImage, 116356. https://doi.org/10.1016/j.neuroimage.2019.116356 [2] de Cheveign, A. et al. (2019). Multiway canonical correlation analysis of brain data. NeuroImage, 186, 728740. https://doi.org/10.1016/j.neuroimage.2018.11.026 [3] de Cheveign, A. et al. (2018). Decoding the auditory brain with canonical component analysis. NeuroImage, 172, 206216. https://doi.org/10.1016/j.neuroimage.2018.01.033 [4] de Cheveign, A. (2016). Sparse time artifact removal. Journal of Neuroscience Methods, 262, 1420. https://doi.org/10.1016/j.jneumeth.2016.01.005 [5] de Cheveign, A., & Parra, L. C. (2014). Joint decorrelation, a versatile tool for multichannel data analysis. NeuroImage, 98, 487505. https://doi.org/10.1016/j.neuroimage.2014.05.068 [6] de Cheveign, A. (2012). Quadratic component analysis. NeuroImage, 59(4), 38383844. https://doi.org/10.1016/j.neuroimage.2011.10.084 [7] de Cheveign, A. (2010). Time-shift denoising source separation. Journal of Neuroscience Methods, 189(1), 113120. https://doi.org/10.1016/j.jneumeth.2010.03.002 [8] de Cheveign, A., & Simon, J. Z. (2008a). Denoising based on spatial filtering. Journal of Neuroscience Methods, 171(2), 331339. https://doi.org/10.1016/j.jneumeth.2008.03.015 [9] de Cheveign, A., & Simon, J. Z. (2008b). Sensor noise suppression. Journal of Neuroscience Methods, 168(1), 195202. https://doi.org/10.1016/j.jneumeth.2007.09.012 [10] de Cheveign, A., & Simon, J. Z. (2007). Denoising based on time-shift PCA. Journal of Neuroscience Methods, 165(2), 297305. https://doi.org/10.1016/j.jneumeth.2007.06.003

2. Artifact Subspace Reconstruction (ASR)

The base code is inspired from the original EEGLAB inplementation [1], while the Riemannian variant [2] was adapted from the rASR toolbox by Sarah Blum.

sql [1] Mullen, T. R., Kothe, C. A. E., Chi, Y. M., Ojeda, A., Kerth, T., Makeig, S., et al. (2015). Real-time neuroimaging and cognitive monitoring using wearable dry EEG. IEEE Trans. Bio-Med. Eng. 62, 25532567. https://doi.org/10.1109/TBME.2015.2481482 [2] Blum, S., Jacobsen, N., Bleichner, M. G., & Debener, S. (2019). A Riemannian modification of artifact subspace reconstruction for EEG artifact handling. Frontiers in human neuroscience, 13, 141.

3. Rhythmic Entrainment Source Separation (RESS)

The code is based on Matlab code from Mike X. Cohen [1]

sql [1] Cohen, M. X., & Gulbinaite, R. (2017). Rhythmic entrainment source separation: Optimizing analyses of neural responses to rhythmic sensory stimulation. Neuroimage, 147, 43-56.

4. Task-Related Component Analysis (TRCA)

This code is based on the Matlab implementation from Masaki Nakanishi, and was adapted to python by Giuseppe Ferraro

sql [1] M. Nakanishi, Y. Wang, X. Chen, Y.-T. Wang, X. Gao, and T.-P. Jung, "Enhancing detection of SSVEPs for a high-speed brain speller using task-related component analysis", IEEE Trans. Biomed. Eng, 65(1): 104-112, 2018. [2] X. Chen, Y. Wang, S. Gao, T. -P. Jung and X. Gao, "Filter bank canonical correlation analysis for implementing a high-speed SSVEP-based brain-computer interface", J. Neural Eng., 12: 046008, 2015. [3] X. Chen, Y. Wang, M. Nakanishi, X. Gao, T. -P. Jung, S. Gao, "High-speed spelling with a noninvasive brain-computer interface", Proc. Int. Natl. Acad. Sci. U.S.A, 112(44): E6058-6067, 2015.

5. Local Outlier Factor (LOF)

sql [1] Breunig M, Kriegel HP, Ng RT, Sander J. 2000. LOF: identifying density-based local outliers. SIGMOD Rec. 29, 2, 93-104. https://doi.org/10.1145/335191.335388 [2] Kumaravel VP, Buiatti M, Parise E, Farella E. 2022. Adaptable and Robust EEG Bad Channel Detection Using Local Outlier Factor (LOF). Sensors (Basel). 2022 Sep 27;22(19):7314. https://doi.org/10.3390/s22197314.

6. Phase Estimation

The oscillator code is based on the Matlab implementation from Michael Rosenblum, and its corresponding paper [1]. The Endpoint Corrected Hilbert Transform (ECHT) method was adapted from [2].

```sql [1] Rosenblum, M., Pikovsky, A., Khn, A.A. et al. Real-time estimation of phase and amplitude with application to neural data. Sci Rep 11, 18037 (2021). https://doi.org/10.1038/s41598-021-97560-5 [2] Schreglmann, S. R., Wang, D., Peach, R. L., Li, J., Zhang, X., Latorre, A., ... & Grossman, N. (2021). Non-invasive suppression of essential tremor via phase-locked disruption of its temporal coherence. Nature communications, 12(1), 363.

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