Publications by authors named "Stanley V Catts"

Article Synopsis
  • Structural neuroimaging studies reveal both common and disorder-specific gray matter deficits across various psychiatric conditions.
  • Large-scale data pooling helps identify potential neuroanatomical factors linked to mental illness vulnerability, although data-sharing faces significant challenges.
  • Using a federated analysis across eight research sites, the study found overlapping gray matter patterns in schizophrenia, major depressive disorder, and autism spectrum disorder, suggesting shared cortical and subcortical vulnerabilities.
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  • The study explores the structural brain differences in individuals with schizophrenia compared to healthy controls, focusing on various brain metrics like cortical thickness and subcortical volume using a large international dataset.
  • Results show that people with schizophrenia have greater variability in brain structure, particularly in the frontotemporal regions, suggesting distinct subtypes of the disorder may exist.
  • The findings highlight the significance of understanding brain structure variability to improve knowledge of schizophrenia and help identify potential biomarkers for the illness.
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  • The study looked at how the brain's left and right sides might differ in people with schizophrenia compared to those without it, using brain scans from over 5,000 patients and 6,000 control subjects.
  • Researchers found that people with schizophrenia had slightly thinner areas in the left side of their brains, especially in certain regions, compared to those without the disorder.
  • The differences in brain structure might be linked to how schizophrenia affects brain functions, like language, but more research is needed to understand why they happen.
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  • The study examines the differences in the morphology of the human cerebral cortex across various psychiatric disorders, suggesting that early growth patterns in the cortex may influence later variations in surface area and mental health outcomes.
  • Using data from over 27,000 MRI scans, researchers identified significant differences in cortical area among individuals with conditions like ADHD, schizophrenia, and major depression, particularly in association cortices linked to cognitive processing.
  • The findings indicate a correlation between these structural differences and prenatal gene expression related to cell types important for brain development, highlighting how prenatal factors may play a crucial role in the risk of developing mental illnesses.
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  • * Researchers discovered 287 genomic regions associated with schizophrenia, emphasizing genes specifically active in excitatory and inhibitory neurons, and identified 120 key genes potentially responsible for these associations.
  • * The findings highlight important biological processes related to neuronal function, suggesting overlaps between common and rare genetic variants in both schizophrenia and neurodevelopmental disorders, ultimately aiding future research on these conditions.
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The mechanisms of intergenerational transmission of posttraumatic stress disorder (PTSD) from parent to child are not yet known. We hypothesised that the mechanisms involved in trauma transmission may be dependent upon sex specific caregiver-child dyads and these dyads may have a differential impact on post-traumatic stress disorder (PTSD). A non-clinical sample of adult offspring (N = 306) of Australian Vietnam veterans was interviewed in-person to assess the relationship between family emotional climate and caregiver attachment with the offspring's adult experience of post-traumatic stress disorder (PTSD).

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The present study examined the course of diagnosed alcohol use disorders (AUDs) in a cohort of Australian veterans of the Vietnam War (N = 388) who were assessed 22 and 36 years after returning home. Standardized interviews provided data on AUDs, posttraumatic stress disorder (PTSD), other psychiatric diagnoses, and combat exposure. Overall, 148 veterans (38.

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A non-clinical sample of male Australian Vietnam veterans, their wives, and adult offspring were interviewed in-person in a national epidemiological study to assess the relationship between the mental ill-health of veterans and the emotional climate of the family while the children were growing up. Veterans were assessed 17 years before their children using standardised psychiatric diagnostic interviews. Family emotional climate was assessed using offspring ratings of parental attachment, and codings of positive and negative family relationship styles based on five minute speech samples provided by the offspring.

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Background: War service increases the risk of post-traumatic stress disorder (PTSD) to combatants, and has been shown to increase the risk of PTSD in their offspring. The extent to which there is an excess compared with the general population is not yet established, nor whether PTSD increases the risk of other psychiatric problems.

Methods: A national sample of 133 sons and 182 daughters of a cohort of 179 Australian Vietnam veterans' families were assessed in person, using structured psychiatric interviews.

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Background: Whether trauma exposure itself or consequent posttraumatic stress disorder (PTSD) is primarily responsible for smoking and failure to quit remains unclear.

Methods: A cohort of male Australian Vietnam veterans (N = 388) was interviewed twice, 22 and 36 years after their return to Australia using standardized psychiatric diagnostic and health interviews and assessment of combat exposure. The smoking trajectory over time revealed a spectrum of outcomes (never smoked, early quitters, late quitters, and continuing smokers).

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Objective: In response to evidence of deteriorating outcomes of people with schizophrenia we recently published a critical review in the journal concerning why outcomes for schizophrenia are not improving. A published commentary on our review raised criticisms that we aim to address herein.

Method: Published data related to four issues raised in the commentary were reviewed.

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Australian male Vietnam veterans (N = 388) were assessed 22 and 36 years after their return to Australia using standardized diagnostic interviews, with added data from Army records and self-report questionnaires. Among veterans who ever had posttraumatic stress disorder (PTSD), 50.3% had a current diagnosis at the second assessment; of those who had a current diagnosis at Wave 1, 46.

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Copy number variants (CNVs) have been strongly implicated in the genetic etiology of schizophrenia (SCZ). However, genome-wide investigation of the contribution of CNV to risk has been hampered by limited sample sizes. We sought to address this obstacle by applying a centralized analysis pipeline to a SCZ cohort of 21,094 cases and 20,227 controls.

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Article Synopsis
  • The study investigates the neuroanatomical differences among cognitive subgroups of schizophrenia based on IQ, aiming to confirm and extend previous findings in a new group of patients.
  • Researchers assessed 183 participants, including 96 patients with schizophrenia or schizoaffective disorder and 87 healthy controls, using MRI and various intelligence and symptom scales.
  • Results showed that IQ subgroups included 25 preserved, 33 moderately deteriorated, and 27 severely deteriorated patients, with significant negative symptoms in the severely deteriorated group, highlighting reduced inferior parietal volume in these patients.
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  • Schizophrenia outcomes are worsening, with increasing mortality and morbidity rates, even in well-resourced areas like Australia, partly due to clinician uncertainty influenced by literature controversies and guideline inconsistencies.
  • A critical review explored six significant aspects of schizophrenia treatment, finding that it is progressive, relapses worsen treatment resistance, and that maintenance antipsychotic medication is crucial even for patients in remission.
  • Evidence supports the effectiveness of long-acting injectable antipsychotics over oral forms for preventing relapse, without causing harmful grey matter changes.
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White matter abnormalities associated with schizophrenia have been widely reported, although the consistency of findings across studies is moderate. In this study, neuroimaging was used to investigate white matter pathology and its impact on whole-brain white matter connectivity in one of the largest samples of patients with schizophrenia. Fractional anisotropy (FA) and mean diffusivity (MD) were compared between patients with schizophrenia or schizoaffective disorder (n = 326) and age-matched healthy controls (n = 197).

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Evidence suggests that anomalous mismatch negativity (MMN) in schizophrenia is related to glutamatergic abnormalities, possibly involving N-methyl-D-aspartate (NMDA) receptors. Decreased cortical expressions of NMDA receptor subunits have been observed in schizophrenia, though not consistently. To aid with integration and interpretation of previous work, we performed a meta-analysis of effect sizes of mRNA or protein levels of the obligatory NR1 subunit in prefrontal cortex from people with schizophrenia.

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People with schizophrenia show probabilistic association learning impairment in conjunction with abnormal neural activity. The selective estrogen receptor modulator (SERM) raloxifene preserves neural activity during memory in healthy older men and improves memory in schizophrenia. Here, we tested the extent to which raloxifene modifies neural activity during learning in schizophrenia.

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Article Synopsis
  • - Growing evidence indicates that testosterone might influence schizophrenia, particularly in relation to cognition and negative symptoms, prompting an investigation into its connection with neural activity in emotion processing among men with this condition.
  • - The study involved 32 healthy controls and 26 individuals with schizophrenia undergoing fMRI while identifying facial emotions, revealing that healthy participants showed higher activation in the left inferior frontal gyrus (IFG) compared to those with schizophrenia.
  • - Results demonstrated a significant positive correlation between serum testosterone levels and IFG activation in men with schizophrenia, suggesting that testosterone may affect emotional processing and social functioning in this group, while no such relationship was found in healthy men.
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Introduction: Patients with delusions typically seek less information when making decisions than controls ("jumping-to-conclusions", JTC) and paradoxically over-adjust to counter-evidence on probabilistic reasoning tasks. Previous studies have examined JTC bias across the delusion-prone continuum, but have not considered the co-occurrence of both biases at early stages of psychosis. This was our aim.

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Sex steroids affect cognitive function as well as emotion processing and regulation. They may also play a role in the pathophysiology of schizophrenia. However, the effects of sex steroids on cognition and emotion-related brain activation in schizophrenia are poorly understood.

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Objectives: Attributional biases to externalize blame for negative events (externalizing bias) and to target other people for blame (personalizing bias) may constitute a vulnerability to psychosis. However, most research to date has only examined attributional biases in chronic patients. We examined attributional style, paranoia, and depression in early psychosis patients to assess the primacy of attributional biases in psychosis.

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Aim: A deficit in theory of mind--the ability to infer and reason about the mental states of others - might underpin the poor social functioning of patients with psychosis. Unfortunately, however, there is considerable variation in how such a deficit is assessed. The current study compared three classic tests of theory of mind in terms of their ability to detect impairment in patients in the early stages of psychosis.

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