DeepAI AI Chat
Log In Sign Up

Systematic Enhancement of Functional Connectivity in Brain-Computer Interfacing using Common Spatial Patterns and Tangent Space Mapping

07/21/2019
by   Saugat Bhattacharyya, et al.
Tohoku University
University of Essex
0

Functional connectivity of cognitive tasks allows researchers to analyse the interaction mapping occurring between different regions of the brain using electroencephalography (EEG) signals. Standard practice in functional connectivity involve studying the electrode pair interactions across several trials. As the cognitive task always involves the human factor, it is inevitable to have lower quality data from the brain signals influenced by the subject concentration or other mental states which can occur anytime over the whole experimental trials. The connectivity among electrodes are heavily influenced by these low quality EEG. In this paper, we aim at enhancing the functional connectivity of mental tasks by implementing a classification step in the process to remove those incorrect EEG trials from the available set. The classification step removes the trials which were mis-classified or had a low probability of occurrence to extract only reliable EEG trials. Through our approach, we have successfully improved the separability among graph parameters for different mental tasks. We also observe an improvement in the readability of the connectivity by focusing only on a group of selected channels rather than employing all the channels.

READ FULL TEXT
06/04/2022

Investigating Brain Connectivity with Graph Neural Networks and GNNExplainer

Functional connectivity plays an essential role in modern neuroscience. ...
05/28/2019

Brain Signal Classification via Learning Connectivity Structure

Connectivity between different brain regions is one of the most importan...
12/12/2009

Modeling sparse connectivity between underlying brain sources for EEG/MEG

We propose a novel technique to assess functional brain connectivity in ...
06/14/2021

Predicting the imagined contents using brain activation

Mental imagery refers to percept-like experiences in the absence of sens...
06/07/2016

Resting state brain networks from EEG: Hidden Markov states vs. classical microstates

Functional brain networks exhibit dynamics on the sub-second temporal sc...