The Deep Learning Method Differentiates Patients with Bipolar Disorder from Controls with High Accuracy Using EEG Data

Author:

Metin Barış1ORCID,Uyulan Çağlar2,Ergüzel Türker Tekin3ORCID,Farhad Shams4ORCID,Çifçi Elvan5,Türk Ömer6ORCID,Tarhan Nevzat5

Affiliation:

1. Medical Faculty, Neurology Department, Uskudar University, Istanbul, Turkey

2. Department of Mechanical Engineering, Katip Çelebi University, İzmir, Turkey

3. Faculty of Engineering and Natural Sciences, Department of Software Engineering, Uskudar University, Istanbul, Turkey

4. Department of Neuroscience, Uskudar University, Istanbul, Turkey

5. Department of Psychiatry, Uskudar University, Istanbul, Turkey

6. Department of Computer Technologies, Artuklu University, Mardin, Turkey

Abstract

Background: Bipolar disorder (BD) is a mental disorder characterized by depressive and manic or hypomanic episodes. The complexity in the diagnosis of Bipolar disorder (BD) due to its overlapping symptoms with other mood disorders prompted researchers and clinicians to seek new and advanced techniques for the precise detection of Bipolar disorder (BD). One of these methods is the use of advanced machine learning algorithms such as deep learning (DL). However, no study of BD has previously adopted DL techniques using EEG signals. Method: EEG signals of 169 BD patients and 45 controls were cleaned from the artifacts and processed using two different DL methods: a one-dimensional convolutional neural network (1D-CNN) combined with the long-short term memory (LSTM) and a two-dimensional convolutional neural network (2D-CNN). Additionally, Class Activation Maps (CAMs) acquired from the bipolar and control groups were used to obtain distinctive regions to specify a particular class in an image. Results: Group identifications were confirmed with 95.91% overall accuracy through the 2D-CNN method, demonstrating very high sensitivity and lower specificity. Also, the overall accuracy obtained from the 1D-CNN + LSTM method was 93%. We also found that F4, C3, F7, and F8 electrode activities produce predominant features to detect the bipolar group. Conclusion: To our knowledge, this study used EEG-based DL analysis for the first time in BD. Our results suggest that the raw EEG-based DL algorithm can successfully differentiate individuals with BD from controls. Class Activation Map (CAM) analysis suggests that prefrontal changes are predominant in EEG data of patients with BD.

Publisher

SAGE Publications

Subject

Neurology (clinical),Neurology,General Medicine

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