Event-Related Potential Markers of Suicidality in Adolescents.

BACKGROUND: Implicit cognitive markers may assist with the prediction of suicidality beyond clinical risk factors. The aim of this study was to investigate neural correlates associated with the Death/Suicide Implicit Association Test (DS-IAT) via event-related potentials (ERP) in suicidal adolescents. METHODS: Thirty inpatient adolescents with suicidal ideations and behaviors (SIBS) and 30 healthy controls from the community were recruited. All participants underwent 64-channel electroencephalography, DS-IAT, and clinical assessments. Hierarchical generalized linear models with spatiotemporal clustering were used to identify significant ERPs associated with the behavioral outcome of DS-IAT (D scores) and group differences. RESULTS: Behavioral results (D scores) showed that the adolescents with SIBS had stronger implicit associations between "death" and "self" than the healthy group (P = .02). Within adolescents with SIBS, participants with stronger implicit associations between "death" and "self" reported more difficulty in controllability of suicidal ideation in the past 2 weeks based on the Columbia-Suicide Severity Rating Scale (P = .03). For the ERP data, the D scores and N100 component over the left parieto-occipital cortex had significant correlations. Significant group differences without behavioral correlation were observed for a second N100 cluster (P = .01), P200 (P = .02), and late positive potential (5 clusters, all P ≤ .02). Exploratory predictive models combining both neurophysiological and clinical measures distinguished adolescents with SIBS from healthy adolescents. CONCLUSIONS: Our results suggest that N100 may be a marker of attentional resources involved in the distinction of stimuli that are congruent or incongruent to associations between death and self. Combined clinical and ERP measures may have utility in future refinements of assessment and treatment approaches for adolescents with suicidality.

A Systematic Review of Long-Interval Intracortical Inhibition as a Biomarker in Neuropsychiatric Disorders.

Long-interval intracortical inhibition (LICI) is a paired-pulse transcranial magnetic stimulation (TMS) paradigm mediated in part by gamma-aminobutyric acid receptor B (GABAB) inhibition. Prior work has examined LICI as a putative biomarker in an array of neuropsychiatric disorders. This review conducted in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) sought to examine existing literature focused on LICI as a biomarker in neuropsychiatric disorders. There were 113 articles that met the inclusion criteria. Existing literature suggests that LICI may have utility as a biomarker of GABAB functioning but more research with increased methodologic rigor is needed. The extant LICI literature has heterogenous methodology and inconsistencies in findings. Existing findings to date are also non-specific to disease. Future research should carefully consider existing methodological weaknesses and implement high-quality test-retest reliability studies.

Psychopathology and Dissociation among Boarding School Students in Eastern Turkey.

A subset of boarding schools for adolescents was established in 1993 in the rural sections of Eastern Turkey to provide equity in terms of availability of education. Even though these schools were beneficial in many respects, implementation of this institutional model gave rise to many challenges such as weaker relationships with parents and defiance of authority figures. Failure to develop a mature response to these challenges could lead to the development of psychopathologies such as depression, psychosis, and dissociation. The main objective of this study is to assess the incidence of psychopathology and dissociative experiences of the residential female students in the regional boarding schools compared to a control group. 187 female participants, 128 attending boarding school, and 59 attending day school, as the control group, were included in the study. Brief Symptom Inventory (BSI) and Adolescent Dissociative Experiences Scale (ADES) were used as measurement scales. T-test, Mann Whitney-U, Spearman correlation chi-square tests were used to evaluate the association between the variables. There was a significant difference in Interpersonal sensitivity and Psychoticism subscales of BSI. ADES score was found to be significantly higher in the Boarding school group. Boarding school students are at a higher risk of developing psychopathology as a common trauma on a group of people can result in shared dissociation, a collective defense mechanism to cope with the injury, which resembles shared delusional disorder within DSM-V (The Diagnostic and Statistical Manual of Mental Disorders). Screening measures should be implemented in boarding schools to evaluate adolescents for psychopathology and preventive measures should be taken to intervene in the early stages.

A Revised And Expanded Version Of The Turkish Childhood Trauma Questionnaire (CTQ-33): Overprotection-Overcontrol As Additional Factor.

This study was concerned with a culture-sensitive revision of the Turkish version of the Childhood Trauma Questionnaire (CTQ-28) and expansion of the instrument through integration of a dimension assessing overprotection - overcontrol (OP-OC). Participants (n = 783) were 37 dissociative and 78 non-dissociative and non-psychotic psychiatric outpatients, and 668 non-clinical people. They completed the revised and expanded version of the CTQ, Dissociative Experiences Scale, Beck Depression Scale, and Relationship Scales Questionnaire. A test-retest assessment was conducted on 25 non-clinical individuals. Among twenty-one alternative and the twenty-five original statements, the items of subsections were selected by correlations between item and item deleted total scores for each subset of original and alternative statements. The 33-item final version (CTQ-33) included five statements for each subsection including OP-OC and three denial items. The principal component analysis on items of the CTQ-33 with a varimax rotation yielded six factors including OP-OC. The inner consistency and the test-retest reliability were good. OP-OC correlated particularly with emotional abuse and neglect, and other types of trauma. There were significant correlations between CTQ-33 and depression, dissociation, and fearful attachment scores. The CTQ-33 differentiated psychiatric from non-clinical groups. The Turkish CTQ-33 is a reliable and valid instrument. OP-OC by caregivers may be as traumatic as other types of childhood adversities. Cross-cultural research would illuminate the significance of OP-OC beyond Turkish culture. The possibility of intergenerational transmission of trauma through OP-OC by fearful parents in and after times of cultural upheaval and political oppression should be considered for future research.

Long-Term Follow-Up of Tufting Enteropathy Caused by EPCAM Mutation p.Asp253Asn and Absent EPCAM Expression.

Tufting enteropathy (TE) is caused by recessive epithelial cell adhesion molecule (EPCAM) mutations, features congenital intractable diarrhea, growth retardation, and a characteristic disorganization of surface enterocytes. TE generally requires parenteral nutrition (PN) throughout childhood and into adulthood or a small bowel transplantation. We report 2 siblings with TE; a 3-year-old patient 1 intermittently receives partial PN, monthly somatostatin therapy, tolerates a normal diet and has a normal stool output. However, she is the sixth patient of 90 TE patients in literature, to develop a chronic arthritis. A 12-year-old patient 2 is on a normal diet, and did not require PN for the past 8 years. Duodenal biopsies showed characteristic tufts, and a complete lack of EPCAM staining. Both siblings were homozygous for EPCAM mutation c.757G>A (p.Asp253Asn). This observation shows that an overall favorable outcome can be obtained in TE, even with abrogated intestinal EPCAM expression.

Socio-legal consequences of Tourette Syndrome and its comorbidities: A case study and review of the literature.

Tourette Syndrome is a neurodevelopmental disorder that is associated with the presence of multiple motor and one or more verbal tics. In this case report, we present a 16 years old Tourette syndrome patient who was diagnosed with comorbid Attention Deficit Hyperactivity Disorder. The patient was evaluated for legal responsibility after she made untrue allegations saying that a bus driver had sexually harassed her. We summarize the case and review the current literature to assess the socio-legal aspects of Tourette syndrome.