Electrophysiological and Cognitive Changes in Hard Coal Miners Associated with Working Underground.

Miners working underground face some risk factors that affect the nervous system-such as high noise, dark environment, chronic stress, and exposure to toxic gases. However, it is not known whether these risk factors affect the cognition of miners. In this study, the cognitive changes of miners were examined through event-related oscillations via electroencephalogram (EEG). Twenty underground miners and control groups, equal to each other in age, education level, and working duration, participated in this study. Neuropsychological tests were applied to all participants to examine their cognitive characteristics. Then, 20-channel EEG was recorded for electrophysiological changes during visual oddball paradigm. Event-related power spectrum and phase locking were analyzed in delta (0.5-3.5), theta (4-7), and alpha (8-13 Hz) frequency bands. It was determined that the delta responses that emerged during the target stimulus differed between the two groups in terms of phase locking (p < 0.05). Considering event-related alpha responses, a statistical difference was found regarding power spectrum and phase locking (p < 0.05). Moreover, the alpha power spectrum in the miners was found to be negatively statistically correlated with working duration (p < 0.05). This study determined that the event-related electrophysiological responses of the miners were negatively affected depending on the working conditions. In addition, neuropsychological assessment determined miners had deficiencies in learning and memory skills and many other cognitive functions such as attention, behavioral inhibition, and visual perception.

Predicting normative data in healthy individuals on the computerized wisconsin card sorting test using regression models.

BACKGROUND: Computerized neuropsychological tests provide advantages to clinicians with cost, administration, and time. However, studies have pointed out performance differences between manual and computerized versions of some neuropsychological tests. One of these is the Wisconsin Card Sorting Test (WCST). Due to the performance difference, the normative data of manual tests cannot be used for their computerized versions. Therefore, normative data searches are needed for computerized versions. OBJECTIVE: This study aimed to determine the norm values of WCST-CV in a healthy sample. METHODS: 422 healthy adults aged 18-78 participated in this study. WCST-CVsub-scores are modeled by Regression Analysis based on Age and Education level to generate normative data. Among the 13 WCST scores, the regression models for WCST 2, WCST 3, WCST 4, WCST 10, and WCST 11 are significant. WCST 2, WCST 4, and WCST 11 scores are estimated with Ordinary Least Squares (OLS). However, WCST 3 and WCST 10 scores are estimated with Weighted Least Squares (WLS) due to the violation of the homoscedasticity assumption. RESULTS: The regression results show that p-values calculated from error increase as age and education level increase. CONCLUSION: As a result of our research, norm values between 18-78 years of age were produced using RA. It was determined that gender was not significant for any sub-score. Therefore, only age and education level from socio-demographic variables were included in the model.

Distinct brain oscillatory responses for the perception and identification of one's own body from other's body.

The body recognition process includes complex visual processing, the sensation, perception, and distinction stages of the stimulus. This study examined this process by using the time-frequency analysis of EEG signals and analyzed the obtained data by using the event-related oscillations method. This study aimed to examine the oscillatory brain responses and distinguish one's own body from other's body. In the present study, 17 young adults were included and the EEGs were recorded with 32 electrodes placed in different locations. Event-related power spectrum and phase-locking analyzes were performed. ITC and ERSP data were analyzed using 2 (condition) × 11 (location) × 2 (hemisphere) ANOVA Design. As we observed a prolonged response in the theta band in the grand averages, we included the time variable in the overall model. As a result, we found that the phase-locking and the event-related power spectrum of the theta response in recognizing one's own body were higher when compared to the phase-locking and the event-related power spectrum of the theta response in recognizing others' body (p < 0.05). When the time variable was included, the early theta response was more phase-locked and had a higher power spectrum compared to the late theta response (p < 0.05). As a result of the power spectrum analysis, the condition × hemisphere interaction effect in the beta band was higher in the left hemisphere regarding increased responses in recognizing one's own body (p < 0.05). As a result of ITC, the main effect of the condition was higher in the recognition of the stimulus of one's own body (p < 0.05). Finally, the theta oscillator response stood out in distinguishing one's own body from other's body. Similarly, the power spectrum in the beta response was higher in the left hemisphere, and this finding is consistent with the literature.

[Maintenance Electroconvulsive Therapy for Agitation and Self Injurious Behaviors in Autism Spectrum Disorder]. / Idame Elektrokonvülsif Terapinin Otizm Spektrum Bozuklugunda Ajitasyon ve Kendine Zarar Verme Davranislarinin Tedavisinde Kullanimi.

Self-injurious behaviors (SIBs) in autism spectrum disorder (ASD) are destructive symptoms that can lead to dangerous injuries and life-threatening risks. Agitation and SIBs may not respond to psychopharmacological and behavioral interventions. There are reports in the literature on improvement after electroconvulsive therapy (ECT) in cases not responding pharmacotherapy. However, data on the efficacy of the therapy on the benefiting patients, the course of the treatment and on the use of maintenance ECT (m-ECT) are very limited. This report presents the clinical features and the course of m-ECT on two cases under follow up for pharmacotherapy resistant ASD with significant agitation, mood disorder and SIBs that could cause severe head traumas. The initial stage of therapy consisted of 7 sessions of ECT patients showed improvement after the 5th session. m-ECT were started since the agitation repeated one week after discharge despite ongoing pharmacotherapy. In the first case, m-ECT was continued once every two weeks for a total of 46 sessions; and in the second case a total of 18 weekly sessions were conducted. No significant side effects or complications were observed and the general state of well-being was preserved. Our paper is among the few that reported succesful treatment of agitation with m-ECT. m-ECT should be considered in treatment resistant cases.

Comparison of computerized and manual versions of the Wisconsin Card Sorting Test on schizophrenia and healthy samples.

This study aims to examine whether there is an equivalence between the two different versions of Wisconsin Card Sorting Test (WCST) regarding psychometric properties on two distinct samples: individuals diagnosed with schizophrenia and those who are healthy. A total of 504 individuals were included in the study, 243 were diagnosed with schizophrenia, and 261 were healthy individuals. Both samples were separated into two subsamples, and the individuals in each separated group were administered either WCST-C (computerized) or WCST-M (manual) version of the test. We compared statistical measures of mean and variance with the data obtained from the two samples. We carried out analyses related to parallel forms reliability and equality of variances of the tests scores produced by parallel forms of the WCST. There was no significant difference between mean values of manual and computerized versions administered for each sample. However, the patterns of variances of the obtained scores were dissimilar. According to these findings, the two versions were found to be inequivalent regarding psychometric properties. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

Mediating effect of intolerance of uncertainty in the relationship between coping styles with stress during pandemic (COVID-19) process and compulsive buying behavior.

Novel CoronaVirus Disease (COVID-19) has begun to expand swiftly beyond all borders and turned into a global source of infection for humans in that all media corporations began to repeatedly share breaking news to release the latest data of all countries. The consequence of that has been a heightened level of anxiety among humans and opting for unorthodox consumption behaviors as consumers. In this study the attempt was to analyze human behaviors during the ongoing pandemic process from the perspective of psychology and marketing fields of science. In so doing, interrelation among anxiety, which surfaced because of Covid-19 pandemic, coping style with stress of individuals and compulsive purchase behavior has been explored. Based on these interrelations, a structural model was suggested. Findings of the research indicated that anxiety has high effect on the helpless approach dimension, which is one of the coping styles with stress; and that helpless approach alone has an effect on compulsive buying behavior. Besides, another objective of the study was to evaluate the mediating effect of intolerance of uncertainty between coping style with stress and compulsive buying behavior. That analysis evidenced that intolerance of uncertainty in such an interrelation had a partial mediating effect.

Smile Attractiveness: Differences among the Perceptions of Dental Professionals and Laypersons.

OBJECTIVE: The aim of this study was to analyze the acceptable values of female and male smile attractiveness based on different amounts of gingival display and buccal corridor widths, as judged by dental professionals and laypersons. METHODS: The frontal smile photographs of a male and female model were modified to create seven different smile photographs of the same individual with different amounts of gingival display and buccal corridor widths. Overall, 249 evaluators in four groups (Group 1=orthodontists, Group 2=prosthodontists, Group 3=oral surgeons, and Group 4=laypersons) evaluated 28 images of different smiles with a visual analogue scale. Significant statistical differences were found among the evaluator's scores (p<0.05). RESULTS: For female smiles, the highest scores were obtained for 12% and 0% buccal corridor width. For male smiles, the highest scores were obtained for 4%, 0%, 12%, and 16% buccal corridor width for Groups 1, 2, 3, and 4 respectively. The highest scores were obtained for +2 mm and -3 mm of gingival display for female smiles. CONCLUSION: The amount of gingival display, the buccal corridor width, and the knowledge in the field affects the perceptions of smile attractiveness. Thus, 3 mm of gingival display and buccal corridor width larger than 16% should be avoided for esthetic reasons during dental treatment.