scholarly journals M98. IS THERE A DEVELOPMENTAL TRAUMAGENIC PHENOTYPE OF PSYCHOSIS?

2020 ◽  
Vol 46 (Supplement_1) ◽  
pp. S172-S172
Author(s):  
Michael Bloomfield ◽  
Mustapha Modaffar ◽  
Franca Onyeama ◽  
Ting-Yun Chang ◽  
Joseph Dickson ◽  
...  
Keyword(s):  
Psychotic Symptom ◽  
Symptom Severity ◽  
Grey Matter ◽  
Adult Survivors ◽  
Secondary Outcome ◽  
Psychotic Symptoms ◽  
Grey Matter Volume ◽  
Symptom Expression ◽  
Neurocognitive Deficits ◽  
Developmental Trauma

Abstract Background Developmental trauma (DT) induces vulnerability to psychosis in adulthood. Adult survivors of DT with psychosis (ASDTP) have worse prognosis across a range of outcomes compared to individuals with psychosis without DT exposure. It has been suggested that this may reflect a developmental ‘traumatogenic’ psychosis phenotype, distinct from idiopathic schizophrenia. Given the implications for precision medicine, we therefore sought to test this hypothesis by conducting systematic reviews and meta-analyses of the literature comparing psychotic symptoms and neuroimaging findings between adults with psychosis diagnoses with and without developmental trauma. Methods We registered our search protocols in PROSPERO (CRD42018105021 and CRD42019131245). We systematically searched literature databases for relevant studies published up to July 2019. “Embase”, “MEDLINE”, and “PsychINFO” were systematically searched. Reference lists, OpenGrey, and Google scholar were hand-searched. Phenomenological outcomes of interests were quantitative and/or qualitative differences in psychotic symptom expression (primary outcome) and other domains of psychopathology (secondary outcome) between ASDTP and people with psychosis who did not report developmental trauma. Neuroimaging outcomes of interest including markers of brain volume and function (e.g. task-induced blood-oxygen dependent signal). Results Seventeen studies of symptomatology were included. Of these, four were meta-analysed. There was a relationship between DT and greater positive (Hedges g=0.53; p<0.001) and negative (Hedges g =0.41; p=0.001) symptom severity. ASDTP had greater neurocognitive deficits and symptom severity in other domains of psychopathology compared to individuals without DT. There was evidence that psychotic symptom content related to traumatic memories in those with experiences of DT. We identified twenty-seven imaging studies (n = 1,438 psychosis patients, n = 1,114 healthy controls or healthy siblings). DT was associated with global and regional differences in grey matter; corticolimbic structural dysconnectivity; a potentiated threat detection system; dysfunction in regions associated with mentalization; and elevated striatal dopamine synthesis capacity. Meta-analysis indicated that developmental trauma is associated with reductions of cortical thickness, global grey matter volume, and hippocampal volumes in patients with psychosis. Discussion Adult survivors of developmental trauma have more severe psychotic symptoms than those without developmental trauma histories. Alongside findings of differences in symptom expression and neuroimaging, the evidence suggests that there may be developmental traumatogenic psychosis phenotype. However, a key mechanistic gap remains how clinical and neuroimaging findings relate to each other. Nonetheless, alternative interpretations, such as an underdiagnosis of post-traumatic stress disorder, could also be plausible. These findings warrant further research to elucidate vulnerability and resilience mechanisms for psychosis in adult survivors of developmental trauma.

scholarly journals Baseline grey matter volume of non-transitioned “ultra high risk” for psychosis individuals with and without attenuated psychotic symptoms at long-term follow-up

2016 ◽  
Vol 173 (3) ◽  
pp. 152-158 ◽  
Author(s):  
Vanessa L. Cropley ◽  
Ashleigh Lin ◽  
Barnaby Nelson ◽  
Renate L.E.P. Reniers ◽  
Alison R. Yung ◽  
...  
Keyword(s):  
High Risk ◽  
Grey Matter ◽  
Psychotic Symptoms ◽  
Grey Matter Volume ◽  
Matter Volume ◽  
Ultra High Risk ◽  
Long Term Follow Up

scholarly journals Psychotic symptom and cannabis relapse in recent-onset psychosis

2006 ◽  
Vol 189 (2) ◽  
pp. 137-143 ◽  
Author(s):  
L. Hides ◽  
S. Dawe ◽  
D. J. Kavanagh ◽  
R. M. Young
Keyword(s):  
Medication Adherence ◽  
Psychotic Symptom ◽  
Symptom Severity ◽  
Cannabis Use ◽  
Psychotic Symptoms ◽  
Recent Onset ◽  
Face To Face ◽  
Relative Contribution ◽  
Increase Risk ◽  
Symptom Relapse

BackgroundCannabis use appears to exacerbate psychotic symptoms and increase risk of psychotic relapse. However, the relative contribution of cannabis use compared with other risk factors is unclear. The influence of psychotic symptoms on cannabis use has received little attention.AimsTo examine the influence of cannabis use on psychotic symptom relapse and the influence of psychotic symptom severity on relapse in cannabis use in the 6 months following hospital admission.MethodAt baseline, 84 participants with recent-onset psychosis were assessed and 81 were followed up weekly for 6 months, using telephone and face-to-face interviews.ResultsA higher frequency of cannabis use was predictive of psychotic relapse, after controlling for medication adherence, other substance use and duration of untreated psychosis. An increase in psychotic symptoms was predictive of relapse to cannabis use, and medication adherence reduced cannabis relapse risk.ConclusionsThe relationship between cannabis use and psychosis may be bidirectional, highlighting the need for early intervention programmes to target cannabis use and psychotic symptom severity in this population.

scholarly journals Exploring the neuroanatomical bases of psychotic features in bipolar disorder

2017 ◽  
Vol 26 (4) ◽  
pp. 358-363 ◽  
Author(s):  
E. Maggioni ◽  
A. C. Altamura ◽  
P. Brambilla
Keyword(s):  
Bipolar Disorder ◽  
Grey Matter ◽  
Psychotic Disorders ◽  
Psychotic Symptoms ◽  
Grey Matter Volume ◽  
Healthy Controls ◽  
Resonance Imaging ◽  
Imaging Studies ◽  
Matter Volume ◽  
Psychotic Features

Although bipolar disorder (BD) is traditionally conceptualised as one diagnostic entity, the heterogeneity of pathophysiological manifestations in BD suggests the need to classify the subtypes of the illness based on neural markers. Specifically, the presence of psychotic symptoms seems to be relevant for the clinical outcome and may have specific neuroanatomical bases. The main objective of the present review was to assess whether the distinction between psychotic BD (PBD) and non-psychotic BD (NPBD) can improve the identification of the neurobiological markers of this complex illness. To this end, we summarised the findings from the magnetic resonance imaging studies that explored the cerebral correlates of psychosis in BD in terms of grey matter volume (GMV). Overall, the results suggest the presence of peculiar GMV differences between PBD and NPBD. Specifically, psychosis in BD seems to be associated with cortical GMV deficits compared with both healthy controls and NPBD, mainly in the frontal region. Conversely, NPBD patients showed GMV deficits in selective regions of the basal ganglia when compared with the other groups. Taken together, this evidence confirms the importance to classify BD based on the psychotic dimension, which may have a specific neurobiological architecture that partially overlaps across multiple psychotic disorders.

scholarly journals Negative symptoms and longitudinal grey matter tissue loss in adolescents at risk of psychosis: Preliminary findings from a 6-year follow-up study

2016 ◽  
Vol 208 (6) ◽  
pp. 565-570 ◽  
Author(s):  
Andrew G. McKechanie ◽  
Thomas W. J. Moorhead ◽  
Andrew C. Stanfield ◽  
Heather C. Whalley ◽  
Eve C. Johnstone ◽  
...  
Keyword(s):  
At Risk ◽  
Negative Symptoms ◽  
Grey Matter ◽  
Imaging Techniques ◽  
Tissue Loss ◽  
Psychotic Symptoms ◽  
Grey Matter Volume ◽  
Left Temporal Lobe ◽  
Left Posterior

BackgroundNegative symptoms are perhaps the most disabling feature of schizophrenia. Their pathogenesis remains poorly understood and it has been difficult to assess their development over time with imaging techniques.AimsTo examine, using tensor-based structural imaging techniques, whether there are regions of progressive grey matter volume change associated with the development of negative symptoms.MethodA total of 43 adolescents at risk of psychosis were examined using magnetic resonance imaging and whole brain tensor-based morphometry at two time points, 6 years apart.ResultsWhen comparing the individuals with significant negative symptoms with the remaining participants, we identified five regions of significant grey matter tissue loss over the 6-year period. These regions included the left temporal lobe, the left cerebellum, the left posterior cingulate and the left inferior parietal sulcus.ConclusionsNegative symptoms are associated with longitudinal grey matter tissue loss. The regions identified include areas associated with psychotic symptoms more generally but also include regions uniquely associated with negative symptoms.

scholarly journals Salience attribution and its relationship to cannabis-induced psychotic symptoms

2016 ◽  
Vol 46 (16) ◽  
pp. 3383-3395 ◽  
Author(s):  
M. A. P. Bloomfield ◽  
E. Mouchlianitis ◽  
C. J. A. Morgan ◽  
T. P. Freeman ◽  
H. V. Curran ◽  
...  
Keyword(s):  
Psychotic Symptom ◽  
Symptom Severity ◽  
Learning Task ◽  
Cannabis Use ◽  
Psychotic Symptoms ◽  
Dopamine Synthesis ◽  
Influx Rate ◽  
Increased Risk ◽  
Significant Difference ◽  
Aberrant Salience

BackgroundCannabis is a widely used drug associated with increased risk for psychosis. The dopamine hypothesis of psychosis postulates that altered salience processing leads to psychosis. We therefore tested the hypothesis that cannabis users exhibit aberrant salience and explored the relationship between aberrant salience and dopamine synthesis capacity.MethodWe tested 17 cannabis users and 17 age- and sex-matched non-user controls using the Salience Attribution Test, a probabilistic reward-learning task. Within users, cannabis-induced psychotic symptoms were measured with the Psychotomimetic States Inventory. Dopamine synthesis capacity, indexed as the influx rate constant Kicer, was measured in 10 users and six controls with 3,4-dihydroxy-6-[18F]fluoro-l-phenylalanine positron emission tomography.ResultsThere was no significant difference in aberrant salience between the groups [F1,32 = 1.12, p = 0.30 (implicit); F1,32 = 1.09, p = 0.30 (explicit)]. Within users there was a significant positive relationship between cannabis-induced psychotic symptom severity and explicit aberrant salience scores (r = 0.61, p = 0.04) and there was a significant association between cannabis dependency/abuse status and high implicit aberrant salience scores (F1,15 = 5.8, p = 0.03). Within controls, implicit aberrant salience was inversely correlated with whole striatal dopamine synthesis capacity (r = −0.91, p = 0.01), whereas this relationship was non-significant within users (difference between correlations: Z = −2.05, p = 0.04).ConclusionsAberrant salience is positively associated with cannabis-induced psychotic symptom severity, but is not seen in cannabis users overall. This is consistent with the hypothesis that the link between cannabis use and psychosis involves alterations in salience processing. Longitudinal studies are needed to determine whether these cognitive abnormalities are pre-existing or caused by long-term cannabis use.

Social cognition and brain organization in chimpanzees (Pan troglodytes) and bonobos (Pan paniscus)

2018 ◽  
Author(s):  
William D. Hopkins ◽  
Cheryl D. Stimpson ◽  
Chet C. Sherwood
Keyword(s):  
Social Cognition ◽  
Social Behaviour ◽  
Grey Matter ◽  
Species Differences ◽  
Pan Paniscus ◽  
Grey Matter Volume ◽  
Evolutionary Models ◽  
Brain Organization ◽  
Matter Volume ◽  
Cognition Sociale

Bonobos and chimpanzees are two closely relates species of the genus Pan, yet they exhibit marked differences in anatomy, behaviour and cognition. For this reason, comparative studies on social behaviour, cognition and brain organization between these two species provide important insights into evolutionary models of human origins. This chapter summarizes studies on socio-communicative competencies and social cognition in chimpanzees and bonobos from the authors’ laboratory in comparison to previous reports. Additionally, recent data on species differences and similarities in brain organization in grey matter volume and distribution is presented. Some preliminary findings on microstructural brain organization such as neuropil space and cellular distribution in key neurotransmitters and neuropeptides involved in social behaviour and cognition is presented. Though these studies are in their infancy, the findings point to potentially important differences in brain organization that may underlie bonobo and chimpanzees’ differences in social behaviour, communication and cognition. Les bonobos et les chimpanzés sont deux espèces du genus Pan prochement liées, néanmoins ils montrent des différences anatomiques, comportementales et cognitives marquées. Pour cette raison, les études comparatives sur le comportement social, la cognition et l’organisation corticale entre ces deux espèces fournissent des idées sur les modèles évolutionnaires des origines humaines. Dans ce chapitre, nous résumons des études sur les compétences socio-communicatives et la cognition sociale chez les chimpanzés et les bonobos de notre laboratoire en comparaison avec des rapports précédents. En plus, nous présentons des données récentes sur les différences et similarités d’organisation corticale du volume et distribution de la matière grise entre espèces. Nous présentons plus de résultats préliminaires sur l’organisation corticale microstructurale comme l’espace neuropile et la division cellulaire dans des neurotransmetteurs clés et les neuropeptides impliqués dans le comportement social et la cognition. Bien que ces études sont dans leur enfance, les résultats montrent des différences d’organisation corticale importantes qui sont à la base des différences de comportement social, la communication et la cognition entre les bonobos et les chimpanzés.

scholarly journals Modelling the cascade of biomarker changes in GRN-related frontotemporal dementia

2021 ◽  
pp. jnnp-2020-323541
Author(s):  
Jessica L Panman ◽  
Vikram Venkatraghavan ◽  
Emma L van der Ende ◽  
Rebecca M E Steketee ◽  
Lize C Jiskoot ◽  
...  
Keyword(s):  
White Matter ◽  
Frontotemporal Dementia ◽  
Disease Severity ◽  
Grey Matter ◽  
Clinical Stage ◽  
Data Driven ◽  
Grey Matter Volume ◽  
Matter Volume ◽  
Mutation Carriers ◽  
Individual Disease

ObjectiveProgranulin-related frontotemporal dementia (FTD-GRN) is a fast progressive disease. Modelling the cascade of multimodal biomarker changes aids in understanding the aetiology of this disease and enables monitoring of individual mutation carriers. In this cross-sectional study, we estimated the temporal cascade of biomarker changes for FTD-GRN, in a data-driven way.MethodsWe included 56 presymptomatic and 35 symptomatic GRN mutation carriers, and 35 healthy non-carriers. Selected biomarkers were neurofilament light chain (NfL), grey matter volume, white matter microstructure and cognitive domains. We used discriminative event-based modelling to infer the cascade of biomarker changes in FTD-GRN and estimated individual disease severity through cross-validation. We derived the biomarker cascades in non-fluent variant primary progressive aphasia (nfvPPA) and behavioural variant FTD (bvFTD) to understand the differences between these phenotypes.ResultsLanguage functioning and NfL were the earliest abnormal biomarkers in FTD-GRN. White matter tracts were affected before grey matter volume, and the left hemisphere degenerated before the right. Based on individual disease severities, presymptomatic carriers could be delineated from symptomatic carriers with a sensitivity of 100% and specificity of 96.1%. The estimated disease severity strongly correlated with functional severity in nfvPPA, but not in bvFTD. In addition, the biomarker cascade in bvFTD showed more uncertainty than nfvPPA.ConclusionDegeneration of axons and language deficits are indicated to be the earliest biomarkers in FTD-GRN, with bvFTD being more heterogeneous in disease progression than nfvPPA. Our data-driven model could help identify presymptomatic GRN mutation carriers at risk of conversion to the clinical stage.

Clinical and anatomical heterogeneity in autistic spectrum disorder: a structural MRI study

2009 ◽  
Vol 40 (7) ◽  
pp. 1171-1181 ◽  
Author(s):  
F. Toal ◽  
E. M. Daly ◽  
L. Page ◽  
Q. Deeley ◽  
B. Hallahan ◽  
...  
Keyword(s):  
Asperger Syndrome ◽  
Autistic Spectrum Disorder ◽  
Grey Matter ◽  
Clinical Phenotype ◽  
Brain Regions ◽  
Spectrum Disorder ◽  
Grey Matter Volume ◽  
Brain Anatomy ◽  
Autistic Spectrum ◽  
Adults With Asd

BackgroundAutistic spectrum disorder (ASD) is characterized by stereotyped/obsessional behaviours and social and communicative deficits. However, there is significant variability in the clinical phenotype; for example, people with autism exhibit language delay whereas those with Asperger syndrome do not. It remains unclear whether localized differences in brain anatomy are associated with variation in the clinical phenotype.MethodWe used voxel-based morphometry (VBM) to investigate brain anatomy in adults with ASD. We included 65 adults diagnosed with ASD (39 with Asperger syndrome and 26 with autism) and 33 controls who did not differ significantly in age or gender.ResultsVBM revealed that subjects with ASD had a significant reduction in grey-matter volume of medial temporal, fusiform and cerebellar regions, and in white matter of the brainstem and cerebellar regions. Furthermore, within the subjects with ASD, brain anatomy varied with clinical phenotype. Those with autism demonstrated an increase in grey matter in frontal and temporal lobe regions that was not present in those with Asperger syndrome.ConclusionsAdults with ASD have significant differences from controls in the anatomy of brain regions implicated in behaviours characterizing the disorder, and this differs according to clinical subtype.

scholarly journals Sex differences in neural correlates of common psychopathological symptoms in early adolescence

2021 ◽  
pp. 1-11
Author(s):  
Francesca Biondo ◽  
Charlotte Nymberg Thunell ◽  
Bing Xu ◽  
Congying Chu ◽  
Tianye Jia ◽  
...  
Keyword(s):  
Internalizing Symptoms ◽  
Grey Matter ◽  
Neural Correlates ◽  
Brain Regions ◽  
Female Adolescents ◽  
Grey Matter Volume ◽  
Community Based ◽  
Psychopathological Symptom ◽  
Strengths And Difficulties ◽  
The Brain

Abstract Background Sex-related differences in psychopathology are known phenomena, with externalizing and internalizing symptoms typically more common in boys and girls, respectively. However, the neural correlates of these sex-by-psychopathology interactions are underinvestigated, particularly in adolescence. Methods Participants were 14 years of age and part of the IMAGEN study, a large (N = 1526) community-based sample. To test for sex-by-psychopathology interactions in structural grey matter volume (GMV), we used whole-brain, voxel-wise neuroimaging analyses based on robust non-parametric methods. Psychopathological symptom data were derived from the Strengths and Difficulties Questionnaire (SDQ). Results We found a sex-by-hyperactivity/inattention interaction in four brain clusters: right temporoparietal-opercular region (p < 0.01, Cohen's d = −0.24), bilateral anterior and mid-cingulum (p < 0.05, Cohen's d = −0.18), right cerebellum and fusiform (p < 0.05, Cohen's d = −0.20) and left frontal superior and middle gyri (p < 0.05, Cohen's d = −0.26). Higher symptoms of hyperactivity/inattention were associated with lower GMV in all four brain clusters in boys, and with higher GMV in the temporoparietal-opercular and cerebellar-fusiform clusters in girls. Conclusions Using a large, sex-balanced and community-based sample, our study lends support to the idea that externalizing symptoms of hyperactivity/inattention may be associated with different neural structures in male and female adolescents. The brain regions we report have been associated with a myriad of important cognitive functions, in particular, attention, cognitive and motor control, and timing, that are potentially relevant to understand the behavioural manifestations of hyperactive and inattentive symptoms. This study highlights the importance of considering sex in our efforts to uncover mechanisms underlying psychopathology during adolescence.

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