AI Article Synopsis
- This study explored brain activity in patients with schizophrenia and bipolar disorder using EEG and a method called multiscale entropy (MSE) analysis.
- Patients with schizophrenia showed higher MSE values at larger scales compared to healthy controls and bipolar patients, while bipolar disorder patients had elevated MSE at middle scales, especially in type I.
- The findings indicate that MSE values correlate with specific psychiatric symptoms, suggesting they could serve as potential biomarkers for understanding these mental health disorders.
Article Abstract
Background: Studies that use nonlinear methods to identify abnormal brain dynamics in patients with psychiatric disorders are limited. This study investigated brain dynamics based on EEG using multiscale entropy (MSE) analysis in patients with schizophrenia (SZ) and bipolar disorder (BD).
Methods: The eyes-closed resting-state EEG data were collected from 51 patients with SZ, 51 patients with BD, and 51 healthy controls (HCs). Patients with BD were further categorized into type I (n = 23) and type II (n = 16), and then compared with patients with SZ. A sample entropy-based MSE was evaluated from the bilateral frontal, central, and parieto-occipital regions using 30-s artifact-free EEG data for each individual. Correlation analyses of MSE values and psychiatric symptoms were performed.
Results: For patients with SZ, higher MSE values were observed at higher-scale factors (i.e., 41-70) across all regions compared with both HCs and patients with BD. Furthermore, there were positive correlations between the MSE values in the left frontal and parieto-occipital regions and PANSS scores. For patients with BD, higher MSE values were observed at middle-scale factors (i.e., 13-40) in the bilateral frontal and central regions compared with HCs. Patients with BD type I exhibited higher MSE values at higher-scale factors across all regions compared with those with BD type II. In BD type I, positive correlations were found between MSE values in all left regions and YMRS scores.
Conclusions: Patients with psychiatric disorders exhibited group-dependent MSE characteristics. These results suggest that MSE features may be useful biomarkers that reflect pathophysiological characteristics.
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| http://dx.doi.org/10.1016/j.pnpbp.2024.111048 | DOI Listing |
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