Recurrent and convolutional neural networks in classification of EEG signal for guided imagery and mental workload detection
Abstract The Guided Imagery technique is reported to be used by therapists all over the world in order to increase the comfort of patients suffering from a variety of disorders from mental to oncology ones and proved to be successful in numerous of ways. Possible support for the therapists can be es...
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Nature Portfolio
2025-03-01
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| author | Filip Postepski Grzegorz M. Wojcik Krzysztof Wrobel Andrzej Kawiak Katarzyna Zemla Grzegorz Sedek |
| author_facet | Filip Postepski Grzegorz M. Wojcik Krzysztof Wrobel Andrzej Kawiak Katarzyna Zemla Grzegorz Sedek |
| author_sort | Filip Postepski |
| collection | DOAJ |
| description | Abstract The Guided Imagery technique is reported to be used by therapists all over the world in order to increase the comfort of patients suffering from a variety of disorders from mental to oncology ones and proved to be successful in numerous of ways. Possible support for the therapists can be estimation of the time at which subject goes into deep relaxation. This paper presents the results of the investigations of a cohort of 26 students exposed to Guided Imagery relaxation technique and mental task workloads conducted with the use of dense array electroencephalographic amplifier. The research reported herein aimed at verification whether it is possible to detect differences between those two states and to classify them using deep learning methods and recurrent neural networks such as EEGNet, Long Short-Term Memory-based classifier, 1D Convolutional Neural Network and hybrid model of 1D Convolutional Neural Network and Long Short-Term Memory. The data processing pipeline was presented from the data acquisition, through the initial data cleaning, preprocessing and postprocessing. The classification was based on two datasets: one of them using 26 so-called cognitive electrodes and the other one using signal collected from 256 channels. So far there have not been such comparisons in the application being discussed. The classification results are presented by the validation metrics such as: accuracy, recall, precision, F1-score and loss for each case. It turned out that it is not necessary to collect signals from all electrodes as classification of the cognitive ones gives the results similar to those obtained for the full signal and extending input to 256 channels does not add much value. In Disscussion there were proposed an optimal classifier as well as some suggestions concerning the prospective development of the project. |
| format | Article |
| id | doaj-art-e93dd856d6d046ecabe732537700b6d6 |
| institution | DOAJ |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Nature Portfolio |
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| series | Scientific Reports |
| spelling | doaj-art-e93dd856d6d046ecabe732537700b6d62025-08-20T02:49:32ZengNature PortfolioScientific Reports2045-23222025-03-0115111810.1038/s41598-025-92378-xRecurrent and convolutional neural networks in classification of EEG signal for guided imagery and mental workload detectionFilip Postepski0Grzegorz M. Wojcik1Krzysztof Wrobel2Andrzej Kawiak3Katarzyna Zemla4Grzegorz Sedek5Department of Neuroinformatics and Biomedical Engineering, Institute of Computer Science, Maria Curie-Sklodowska UniversityDepartment of Neuroinformatics and Biomedical Engineering, Institute of Computer Science, Maria Curie-Sklodowska UniversityDepartment of Neuroinformatics and Biomedical Engineering, Institute of Computer Science, Maria Curie-Sklodowska UniversityDepartment of Neuroinformatics and Biomedical Engineering, Institute of Computer Science, Maria Curie-Sklodowska UniversityInstitute of Psychology, SWPS UniversityInstitute of Psychology, SWPS UniversityAbstract The Guided Imagery technique is reported to be used by therapists all over the world in order to increase the comfort of patients suffering from a variety of disorders from mental to oncology ones and proved to be successful in numerous of ways. Possible support for the therapists can be estimation of the time at which subject goes into deep relaxation. This paper presents the results of the investigations of a cohort of 26 students exposed to Guided Imagery relaxation technique and mental task workloads conducted with the use of dense array electroencephalographic amplifier. The research reported herein aimed at verification whether it is possible to detect differences between those two states and to classify them using deep learning methods and recurrent neural networks such as EEGNet, Long Short-Term Memory-based classifier, 1D Convolutional Neural Network and hybrid model of 1D Convolutional Neural Network and Long Short-Term Memory. The data processing pipeline was presented from the data acquisition, through the initial data cleaning, preprocessing and postprocessing. The classification was based on two datasets: one of them using 26 so-called cognitive electrodes and the other one using signal collected from 256 channels. So far there have not been such comparisons in the application being discussed. The classification results are presented by the validation metrics such as: accuracy, recall, precision, F1-score and loss for each case. It turned out that it is not necessary to collect signals from all electrodes as classification of the cognitive ones gives the results similar to those obtained for the full signal and extending input to 256 channels does not add much value. In Disscussion there were proposed an optimal classifier as well as some suggestions concerning the prospective development of the project.https://doi.org/10.1038/s41598-025-92378-xGuided imageryMental workloadEEGCNNLSTM |
| spellingShingle | Filip Postepski Grzegorz M. Wojcik Krzysztof Wrobel Andrzej Kawiak Katarzyna Zemla Grzegorz Sedek Recurrent and convolutional neural networks in classification of EEG signal for guided imagery and mental workload detection Scientific Reports Guided imagery Mental workload EEG CNN LSTM |
| title | Recurrent and convolutional neural networks in classification of EEG signal for guided imagery and mental workload detection |
| title_full | Recurrent and convolutional neural networks in classification of EEG signal for guided imagery and mental workload detection |
| title_fullStr | Recurrent and convolutional neural networks in classification of EEG signal for guided imagery and mental workload detection |
| title_full_unstemmed | Recurrent and convolutional neural networks in classification of EEG signal for guided imagery and mental workload detection |
| title_short | Recurrent and convolutional neural networks in classification of EEG signal for guided imagery and mental workload detection |
| title_sort | recurrent and convolutional neural networks in classification of eeg signal for guided imagery and mental workload detection |
| topic | Guided imagery Mental workload EEG CNN LSTM |
| url | https://doi.org/10.1038/s41598-025-92378-x |
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