Publications by authors named "Rhoshel K Lenroot"

Aim: This exploratory study aimed to examine differences in rates of self and clinician-reports of trauma in youth at clinical high risk for psychosis (CHR) and whether rates of reporting differed by ethnicity.

Methods: Self-reported history of trauma was collected at intake amongst youth at CHR enrolled in Coordinated Specialty Care (CSC) services (N = 52). A structured chart review was conducted for the same sample to identify clinician-reported history of trauma throughout treatment in CSC.

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Article Synopsis
  • The human brain evolves over time, with changes in structure affecting mental health and diseases throughout life.
  • This study identifies genetic variants that influence brain growth and shrinkage, using data from 15,640 individuals and focusing on 15 brain structures.
  • Key genes linked to metabolism were found, highlighting connections to conditions like depression and schizophrenia, and suggesting that understanding these genetic factors could lead to insights about healthy and problematic brain development and aging.
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Background: Bipolar disorder (BD) is associated with cortical and subcortical structural brain abnormalities. It is unclear whether such alterations progressively change over time, and how this is related to the number of mood episodes. To address this question, we analyzed a large and diverse international sample with longitudinal magnetic resonance imaging (MRI) and clinical data to examine structural brain changes over time in BD.

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Objective: The primary objectives of this study were to examine referral sources and demographic, clinical, and socioenvironmental characteristics of Hispanics referred to and enrolled in a program of coordinated specialty care (Early CSC program) for first-episode psychosis, to compare them with characteristics of other referred and enrolled racial-ethnic groups, and to identify factors associated with enrollment in the program.

Methods: A retrospective review was conducted for all individuals referred to and enrolled in the Early CSC program over a 2-year period. Extracted data included referral sources and demographic and clinical characteristics.

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Bipolar disorder is associated with cognitive deficits and cortical changes for which the developmental dynamics are not well understood. The dopamine D2 receptor (DRD2) gene has been associated with both psychiatric disorders and cognitive variability. Here we examined the mediating role of brain structure in the relationship between DRD2 genomic variation and cognitive performance, with target cortical regions selected based on evidence of association with DRD2, bipolar disorder and/or cognition from prior literature.

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The hippocampus consists of anatomically and functionally distinct subfields that may be differentially involved in the pathophysiology of bipolar disorder (BD). Here we, the Enhancing NeuroImaging Genetics through Meta-Analysis Bipolar Disorder workinggroup, study hippocampal subfield volumetry in BD. T1-weighted magnetic resonance imaging scans from 4,698 individuals (BD = 1,472, healthy controls [HC] = 3,226) from 23 sites worldwide were processed with FreeSurfer.

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  • First-degree relatives of schizophrenia patients (SZ-FDRs) exhibit similar brain and cognitive abnormalities as patients, while those related to bipolar disorder (BD-FDRs) show larger brain volume but inconsistent cognitive patterns.
  • A meta-analysis involving nearly 6,000 participants found that SZ-FDRs have a thinner cortex and lower IQ scores compared to controls, whereas BD-FDRs show a larger cortical surface area with only slight IQ reductions.
  • Both relative groups achieved similar educational levels, indicating that structural brain differences are likely connected to the predisposition for schizophrenia or bipolar disorder rather than general cognitive impairments.
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Evidence-based parenting interventions are effective in reducing conduct problems, yet these interventions have limited reach, and few involve the participation of fathers. This paper describes the outcomes of an open trial of ParentWorks, a universal, online, father-inclusive parenting intervention aiming to decrease childhood behavioural problems and promote positive parenting in mothers and fathers. A total of 388 families (456 individual parents; 36.

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Background: Schizophrenia and bipolar disorder share genetic liability, and some structural brain abnormalities are common to both conditions. First-degree relatives of patients with schizophrenia (FDRs-SZ) show similar brain abnormalities to patients, albeit with smaller effect sizes. Imaging findings in first-degree relatives of patients with bipolar disorder (FDRs-BD) have been inconsistent in the past, but recent studies report regionally greater volumes compared with control subjects.

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  • - Relative stability in cognitive deficits in schizophrenia contrasts with observed accelerated brain deterioration, suggesting cognitive reserve (CR) might play a key role in protecting cognitive function despite brain changes.
  • - A study of 214 individuals with schizophrenia and 168 healthy controls found that while patients experienced greater age-related declines in brain structure, they did not show similar declines in fluid reasoning unless they had low CR.
  • - The findings indicate that CR can mitigate age-related cognitive decline in schizophrenia, potentially explaining discrepancies in the relationship between brain structure and cognitive outcomes seen in previous research.
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  • Brain-Derived Neurotrophic Factor (BDNF) is important for brain functions like synaptogenesis and synaptic plasticity, which are crucial in conditions like schizophrenia.
  • This study compared BDNF levels in the blood of 95 individuals with schizophrenia and 80 healthy controls, focusing specifically on sex differences.
  • Results showed that females with schizophrenia had higher BDNF levels compared to males with schizophrenia and healthy females, indicating that these differences could impact the way schizophrenia manifests in different sexes.
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  • Childhood adversity, such as various forms of abuse and family conflict, is a significant risk factor for developing schizophrenia and can impair cognitive function during childhood.
  • The Australian Schizophrenia Research Bank study found three cognitive groups among individuals with schizophrenia based on cognitive impairment levels, with the "compromised" group showing the worst outcomes.
  • The research indicates that individuals with schizophrenia experienced more childhood adversity compared to healthy controls, with specific factors like lack of parental involvement and family breakdown being particularly prevalent in those with greater cognitive impairment.
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Background: Glutamine plus glutamate (Glx), as well as N-acetylaspartate compounds, (NAAc), a marker of neuronal viability, are quantified with proton magnetic resonance spectroscopy (H-MRS) and have been reported altered in psychotic disorders. However, few studies have compared these neurometabolites in bipolar disorder and schizophrenia.

Methods: Used H-MRS imaging from an axial supraventricular slab of gray matter (GM; medial-frontal and medial-parietal) and white matter (WM; bilateral-frontal and bilateral-parietal) voxels.

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The analysis of time-varying activity and connectivity patterns (i.e., the chronnectome) using resting-state magnetic resonance imaging has become an important part of ongoing neuroscience discussions.

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While there has been increasing interest in promoting father engagement in parenting interventions for child wellbeing, both research and practice endeavors have been hindered by a lack of a measure of father engagement practices. This paper reports the development and evaluation of a comprehensive, practitioner-report measure of father engagement practices--the (FEQ). Practitioners ( = 589; 84.

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  • The study explores how genetic factors (dopaminergic polymorphisms) and environmental factors (childhood adversity) affect brain structures related to dopamine in individuals with schizophrenia or schizoaffective disorder.
  • Researchers analyzed data from 249 participants, focusing on brain volumes in regions like the hippocampus and putamen, finding significant effects related to diagnosis and genetic risk.
  • The results indicate that the left putamen may be especially affected by the interaction between genetic risk and childhood adversity, but further research with larger samples is necessary to understand these relationships more clearly.
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  • - Individuals with schizophrenia who carry a specific genetic variant (rs2067477) in the M1 receptor gene show poorer performance on cognitive tests and reduced brain structure in certain areas.
  • - A study was conducted with 176 patients to see if this genetic variation affected brain thickness and surface area, but no significant differences were found.
  • - The researchers suggest future studies should look at related genetic variations near rs2067477 to better understand their impact on brain structure.
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Bipolar disorders (BDs) are among the leading causes of morbidity and disability. Objective biological markers, such as those based on brain imaging, could aid in clinical management of BD. Machine learning (ML) brings neuroimaging analyses to individual subject level and may potentially allow for their diagnostic use.

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Fathers are underrepresented in interventions focussing on child well-being, yet research suggests their involvement may be critical to enhancing intervention effectiveness. This study aimed to provide the first Australian benchmark of rates of father attendance across several child mental health services. Retrospective casefile reviews were conducted to obtain data on father and mother attendance at 10 Australian child mental health services.

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Positive parenting programs have a strong evidence base for improving parent-child relationships, strengthening families, and reducing childhood behavior disturbances. Their reach is less than optimal however, with only a minority of families in need of help participating. Father involvement is particularly low.

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There is substantial evidence that parenting programs are effective in improving parenting and child mental health outcomes. While there is increasing focus on delivering parenting interventions online to increase their reach and dissemination, fathers are underrepresented in all formats of parenting programs. However, research suggests that father participation is important for intervention effectiveness.

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  • Functional near-infrared spectroscopy (fNIRS) is a non-invasive brain imaging technique gaining popularity for studying brain function in individuals with autism because it is portable and tolerates motion well.
  • A review of existing fNIRS studies aims to summarize key findings related to autism and discuss their significance in understanding brain function in this population.
  • The review also addresses potential limitations of fNIRS and suggests how new research could help overcome these challenges.
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Background: The profile of cortical neuroanatomical abnormalities in schizophrenia is not fully understood, despite hundreds of published structural brain imaging studies. This study presents the first meta-analysis of cortical thickness and surface area abnormalities in schizophrenia conducted by the ENIGMA (Enhancing Neuro Imaging Genetics through Meta Analysis) Schizophrenia Working Group.

Methods: The study included data from 4474 individuals with schizophrenia (mean age, 32.

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