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1.
Eur J Neurosci ; 57(3): 458-478, 2023 02.
Artículo en Inglés | MEDLINE | ID: mdl-36504464

RESUMEN

Visual shape completion is a canonical perceptual organization process that integrates spatially distributed edge information into unified representations of objects. People with schizophrenia show difficulty in discriminating completed shapes, but the brain networks and functional connections underlying this perceptual difference remain poorly understood. Also unclear is whether brain network differences in schizophrenia occur in related illnesses or vary with illness features transdiagnostically. To address these topics, we scanned (functional magnetic resonance imaging, fMRI) people with schizophrenia, bipolar disorder, or no psychiatric illness during rest and during a task in which they discriminated configurations that formed or failed to form completed shapes (illusory and fragmented condition, respectively). Multivariate pattern differences were identified on the cortical surface using 360 predefined parcels and 12 functional networks composed of such parcels. Brain activity flow mapping was used to evaluate the likely involvement of resting-state connections for shape completion. Illusory/fragmented task activation differences ('modulations') in the dorsal attention network (DAN) could distinguish people with schizophrenia from the other groups (AUCs > .85) and could transdiagnostically predict cognitive disorganization severity. Activity flow over functional connections from the DAN could predict secondary visual network modulations in each group, except in schizophrenia. The secondary visual network was strongly and similarly modulated in each group. Task modulations were dispersed over more networks in patients compared to controls. In summary, DAN activity during visual perceptual organization is distinct in schizophrenia, symptomatically relevant, and potentially related to improper attention-related feedback into secondary visual areas.


Asunto(s)
Trastorno Bipolar , Ilusiones , Esquizofrenia , Humanos , Esquizofrenia/diagnóstico por imagen , Encéfalo/fisiología , Mapeo Encefálico , Trastorno Bipolar/diagnóstico por imagen , Cognición , Imagen por Resonancia Magnética
2.
Psychiatr Serv ; 73(7): 787-800, 2022 07.
Artículo en Inglés | MEDLINE | ID: mdl-34875848

RESUMEN

OBJECTIVE: The authors conducted a systematic review of studies evaluating vocational interventions for young people with psychiatric conditions to determine the extent to which services were adapted for young people and whether services promoted gains in postsecondary education and employment. METHODS: Five databases (PubMed, PsycINFO, Web of Science, Academic Search Premier, and ERIC) were searched. Sources eligible for inclusion were controlled studies published between 2000 and mid-2020 that evaluated a vocational intervention and examined postsecondary educational or employment outcomes for youths or young adults (ages 14-35 years) with psychiatric conditions. RESULTS: Ten studies met the inclusion criteria. Several of the studies evaluated services that were adapted for young people, including through the incorporation of educational supports. The most consistent finding was that services based on the individual placement and support (IPS) model improved employment outcomes more effectively than did comparison approaches and treatment as usual. Fewer studies assessed educational outcomes, and they yielded mixed results; however, recent findings from a controlled trial indicate that an enhanced IPS intervention that included well-specified supported education and skills training led to significantly superior outcomes in both education and employment. CONCLUSIONS: These results provide support for the efficacy of IPS-based services to improve employment outcomes among young people with psychiatric conditions and suggest that adapting IPS to include comprehensive educational supports and skills training may be important for efforts to improve postsecondary educational outcomes. Additional well-controlled intervention studies that examine educational and longer-term outcomes should further inform the development and delivery of vocational services for this population.


Asunto(s)
Empleos Subvencionados , Trastornos Mentales , Adolescente , Adulto , Escolaridad , Humanos , Trastornos Mentales/terapia , Rehabilitación Vocacional/métodos , Adulto Joven
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