ISSN 1225-8709 (Print)
ISSN 2005-7571 (Online)
Volume 26, Number 1 (1/2019)
Original Article <page. 8-13 >

Comparison of Fornix and Stria Terminalis Connectivity among First-Episode Schizophrenia, Chronic Schizophrenia and Healthy Controls

Arira Lee, BS1;Mirim Yun, MD2;Ki Hwan Yook, MD1;Tai Kiu Choi, MD1;Kang Soo Lee, MD1;Minji Bang, MD1; and Sang-Hyuk Lee, MD1;

1;Department of Psychiatry, CHA Bundang Medical Center, CHA University, Seongnam, 2;Department of Psychiatry, Hanyang University College of Medicine, Seoul, Korea

Objectives : Disrupted integrities of the fornix and stria terminalis have been suggested in schizophrenia. However, very few studies have focused on the fornix and stria terminalis comparing first-episode schizophrenia (FESZ), chronic schizophrenia (CS), and healthy controls (HCs) with the application of diffusion-tensor imaging (DTI) technique. The objective of this study is to compare the connectivity of the fornix and stria terminalis among FESZ, CS, and HCs.

Methods : We included the 44 FESZ patients, 39 CS patients and 20 HCs in this study. Voxel-wise statistical analysis of the fractional anisotropy (FA) data was performed using Tract-Based Spatial Statistics to analyze the connectivity of fornix and stria terminalis. In addition, the Scale for the Assessment of Positive Symptoms (SAPS) and the Scale for the Assessment of Negative Symptoms (SANS) were used to evaluate clinical symptom severities.

Results : There were no significant differences between the FESZ, CS, and HCs in age, sex, education years. The SAPS and SANS scores of the schizophrenia groups showed no significant differences. FA values of the right fornix cres/stria terminalis in the CS group were significantly lower than those in FESZ and HCs. There were no significant differences of FA values of the right fornix cres/stria terminalis between the FESZ and the HCs. Pearson correlation analyses revealed that significant correlation between FA values of the right fornix cres/stria terminalies of the the FESZ group and positive, negative symptom scales, and FA values of the right fornix cres/stria terminalis of the CS group and negative symptom scales.

Conclusions : This study shows that FA values of the fornix and stria terminalis in the CS were lower than in the FESZ and the HCs. These results suggest that the fornix and stria terminalis can play a role in pathophysiology of schizophrenia. Thus current study can broaden our understanding of the pathophysiology of schizophrenia.


Key words : Schizophrenia;White matter;Fornix, brain;Septal nuclei.

PSYCHIATRY INVESTIGATION

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