Polygraph Accuracy of Control Question Test in Criminal Cases / 法医学杂志

Objective To explore polygraph accuracy of Control Question Test （CQT）and whether it could be influenced by examinee's education level and type of violation of law. Methods Real cases of CQT （n=104） and the data from MAO （n=296） were collected. The polygraph accuracy of CQT was calculated. Variance analysis on three groups of different education levels was used to compare their age, and then the chi-square test was employed to compare polygraph accuracy among the groups. Independent sample t test was used to compare the age of subjects in the two groups of different types of violation of law, and then chi-square test was used to compare the true positive rate and true negative rate of lie detection after integration. Results In CQT lie detection of criminal cases, the true positive rate was 87.00%, the false negative rate was 13.00%, the true negative rate was 82.20%, and the false positive rate was 17.80%. There was no statistical significance in the differences between the true positive rate and the true negative rate （P>0.05）. In CQT lie detection of the groups of different education levels, there was no statistical significance in the differences between the true positive rates （P>0.05） while the differences between the true negative rates had statistical significance （P<0.05）. There was no statistical significance in the differences of both the true positive rates and the true negative rates between the violent violation of law and non-violent violation of law （P>0.05）. Conclusion There is no significant difference between the efficiency of CQT lie detection of identifying criminals and excluding innocents. However, a comparatively high false positive rate and false negative rate still exist. The efficiency of CQT lie detection identifying criminals may not influenced by the examinee's education level and type of violation of law, but its efficiency of excluding innocents may be influenced by the examinee's education level.

Correlation between gut microbiota and behavior symptoms in children with autism spectrum disorder / 中国当代儿科杂志

OBJECTIVE@#To investigate the composition of gut microbiota and its correlation with the severity of behavior symptoms in children with autism spectrum disorder (ASD).@*METHODS@#A total of 30 children with ASD were enrolled as the ASD group, and 20 healthy children matched for age and sex were enrolled as the healthy control group. Related clinical data were analyzed. The V3-V4 hypervariable regions of the bacterial 16S rRNA gene in fecal samples were sequenced. The severity of behavior symptoms in children with ASD was assessed using the autism behavior checklist. The Spearman's correlation analysis was used to investigate the correlation between gut microbiota and the severity of behavior symptoms in children with ASD.@*RESULTS@#There was a significant difference in the composition of gut microbiota between the two groups. Compared with the healthy control group, the ASD group had significant reductions in Shannon index and Shannoneven index (P<0.05), as well as a significant reduction in the percentage of Firmicutes and a significant increase in the percentage of Acidobacteria in feces (P<0.05). In the ASD group, the dominant bacteria were Megamonas, Megasphaera, and Barnesiella, while in the healthy control group, the dominant bacteria were Eubacterium_rectale_group, Ezakiella, and Streptococcus. In the children with ASD, the abundance of Megamonas was positively correlated with the scores of health/physical/behavior and language communication (P<0.05).@*CONCLUSIONS@#The development of ASD and the severity of behavior symptoms are closely associated with the composition of gut microbiota.

The post-injury regenerating ability of temporomandibular joint of rats exposed to the repeated + Gz forces / 中华口腔医学杂志

<p><b>OBJECTIVE</b>To observe the post-injury regenerating ability of temporomandibular joint of rats exposed to the repeated + Gz forces.</p><p><b>METHODS</b>One hundred and eight male rats were randomly assigned to 9 groups, with 12 rats in each group. Group A was normally fed serving as the blank control group. Group B was only fixed with rat-kept devices for 5 minutes as the fixed control group. Group C was borne +1 Gz for 5 minutes. In the same position as group C, group D, E, F, G, H and I were repeatedly exposed to +10 Gz for 30 seconds each time with 5 times a day and +1 Gz for 1 minutes as a interval. The 6 groups were treated in the condition above for 4 days a week and 4 weeks in total. The rats in group A, B, C and D were killed on the next day after the centrifuge. The rats in group E, F, G, H and I were killed at 1, 2, 4, 8 and 12 weeks after the centrifuge, respectively. After the rats were killed, temporomandibular joint were taken for observation under optical microscope, scanning electron-microscope (SEM) and transmission electron-microscope (TEM).</p><p><b>RESULTS</b>There was no significant difference observed in group A, B and C. But in group D, E, F, G, H and I pathologic injuries and self-regeneration were seen in TMJ in different degrees.</p><p><b>CONCLUSIONS</b>The injury of TMJ could regenerate gradually with time.</p>