Caudate nucleus and thalamus in untreated patients with obsessive-compulsive disorder: a magnetic resonance spectroscopy study / 中华行为医学与脑科学杂志

Objective:To investigate the neurobiochemical metabolites of caudate nucleus and thalamus in patients with obsessive-compulsive disorder and their relationship with obsessive-compulsive symptoms.Methods:From April 2019 to January 2022 in Beijing Anding Hospital, totally 25 untreated patients with obsessive-compulsive disorder were recruited, and 20 healthy controls matched with gender, age and educational background were recruited for the study.The maps of neurobiochemical metabolites of patients and normal controls were collected by hydrogen proton magnetic resonance spectroscopy.With bilateral caudate nucleus and thalamus as brain regions of interest.The relative concentrations of N-acetylaspartic acid (NAA), glutamic acid (Glu) and γ-aminobutyric acid (GABA) were fitted by LCModel software.At the same time, the clinical symptoms of patients were evaluated with Yale-Brown obsessive-compulsive scale (Y-BOCS) and Hamilton anxiety scale (HAMA). SPSS 20.0 software was used for statistical analysis.Independent double sample t-test was used to compare the differences of different nerve biochemical metabolite concentrations between patients with obsessive-compulsive disorders and healthy controls.Pearson correlation analysis was used to explore the correlation between biochemical metabolite concentrations and clinical symptoms. Results:The Glu concentration in the left thalamus of patients with obsessive-compulsive disorder (3.97±0.41) was higher than that of the control group (3.66±0.55)( t=-2.11, P<0.05), while the NAA concentration was (4.87±0.47)lower than that of the control group (5.15±0.44)( t=2.05, P<0.05). The GABA concentrations in the right caudate nucleus (0.50±0.18) and thalamus (0.80±0.19) were lower than those in the control group ((0.63±0.23), (0.96±0.24))( t=2.08, 2.36, both P<0.05). Pearson correlation analysis showed that the Glu concentration in the left caudate nucleus of patients with obsessive-compulsive disorder was positively correlated with the total score of Y-BOCS( r=0.46, P<0.05). Spearman correlation analysis showed that Glu concentration in the right caudate nucleus was positively correlated with the total score of HAMA in patients with obsessive-compulsive disorder ( r=0.46, P<0.05). Conclusion:NAA, Glu and GABA metabolism in caudate nucleus and thalamus are abnormal in patients with obsessive-compulsive disorder, and Glu concentration is positively correlated with the severity of obsessive-compulsive and anxiety symptoms.

Application of virtual reality in diagnosis and treatment of obsessive-compulsive disorder / 中华行为医学与脑科学杂志

The application of diagnosis and treatment technology based on virtual reality (VR) in obsessive-compulsive disorder (OCD) has attracted more and more attention from researchers around the world. The preliminary exploration shows that it is a promising auxiliary evaluation and treatment method. From the perspective of effectiveness and suitability, this paper systematically reviewed the research status of the application of VR technology in OCD clinical symptom evaluation, cognitive function evaluation and clinical intervention, discussed the similarities and differences, advantages and limitations between traditional evaluation and treatment methods and VR-based diagnosis and treatment technology, and prospected the new trend of the application of VR technology in OCD diagnosis and treatment, and provided a reference for the introduction, development and application of VR technology in China to improve the effect of OCD diagnosis and treatment.

Preliminary development of self-screening questionnaire for somatoform symptoms / 中华行为医学与脑科学杂志

Objective To develop a simple,multi-dimensional self-screening questionnaire for som-atoform symptoms(SQSS). Methods Based on theoretical framework,the study developed the items of the questionnaire. The first draft of the questionnaire was screened through the expert evaluation method. Four groups of 359 subjects were selected to test the reliability and validity of questionnaire. Results The explor-atory factor analysis showed that the four factors(somatic symptoms,negative perception,illness behavior and social function) were extracted and the interpretable percentage of variance was 61. 165%. The correlation between the subscales and the total scales was 0. 740-0. 887,and the correlation coefficient between the sub-scales was 0. 503-0. 625. The Crobanch's α coefficient of the questionnaire was 0. 926,and the Spearman-Brown score of the questionnaire was 0. 868. The retest correlation coefficient of the total scale was 0. 876. A cutoff of 23 points in the SQSS was identified for screening somatoform disorders, and the sensitivity was 0. 880 and the specificity was 0. 606. Conclusion SQSS has good reliability and validity,and can be prelim-inarily used as a self-screening tool for patients with somatoform symptoms or disorders in clinical settings.

Attentional bias on threating stimuli in patients with obsessive-compulsive disorder / 中华行为医学与脑科学杂志

Attentional bias towards threat may be a key factor associated with development and maintaining symptoms of obsessive-compulsive disorder (OCD).Through the study of attentional bias feature in OCD would be helpful to understand the obsessive-compulsive symptoms and development.We use emotion Stroop task,dot-probe task and eye-tracking methodology in measure attentional bias of obsessive-compulsive disorder,found that OCD patients may performance attentional bias to the general threat stimulus and obsessive-compulsive symptoms related stimulus,and OCD patients may have attentional bias to those obsessivecompulsive symptoms related stimulus in specialty.At present,difficult to repeat studies and inconsistent results are the main problems,and the differences in experimental materials and samples may be the important factors that lead to those inconsistency results.