Journal
JOURNAL OF AFFECTIVE DISORDERS
Volume 295, Issue -, Pages 788-796Publisher
ELSEVIER
DOI: 10.1016/j.jad.2021.08.143
Keywords
Major depressive disorder; Somatic symptoms; Amplitude of low- frequency fluctuation; Regional homogeneity
Categories
Funding
- National Natural Science Youth Fund Project [81701345, 81601192, 81601193]
- Shanxi Scholarship Council of China [HGKY2019098]
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Somatic depression is more severe than pure depression. Reduction in ReHo and ALFF in the precentral gyrus, postcentral gyrus, and paracentral gyrus may play a significant role in the pathophysiology of somatic symptoms in MDD.
Objective: It has been established that major depressive disorder (MDD) is accompanied by various somatic symptoms that are related to the clinical course and severity of depression. However, the mechanisms of somatic symptoms in MDD have rarely been studied. In this study, we sought to investigate the functional neurological changes in MDD patients with somatic symptoms based off the regional homogeneity (ReHo) and the amplitude of low-frequency fluctuation (ALFF). Method: Study participants included 74 first-episode, drug naive MDD patients as well as 70 healthy subjects (HCs). Patients diagnosed with MDD were separated into two groups based on the presence (n=50) or absence (n=24) of somatic symptoms. Functional images were obtained and analyzed. Alterations in ReHo/ALFF and the severity of clinical symptoms were investigated using correlation analysis. Results: More severe depressive symptoms were observed in the somatic depression group than that of the pure depression group (P< 0.001). Furthermore, there was a significant reduction in ReHo and ALFF in the bilateral precentral gyrus, bilateral postcentral gyrus, and left paracentral gyrus in the somatic MDD group as compared to the pure depression group (GRF correction, voxel-P< 0.001, cluster-P < 0.01). Pearson correlation analysis revealed a negative correlation between ReHo and ALFF values in these abnomal regions with the severity of somatic and depressive symptoms (P< 0.01). Conclusion: Somatic depression is more severe than pure depression. The ReHo and ALFF changes in the precentral gyrus, postcentral gyrus, and paracentral gyrus may serve a significant role in the pathophysiology of somatic symptoms in MDD.
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