Structural alterations of the pyramidal pathway in schizoid and schizotypal cluster A personality disorders
Autor: | Narcís Cardoner, Carles Orfila, Antoni Rovira, Carles Soriano-Mas, Diego Palao, José M. Menchón, Jordi E. Obiols, Esther Via, Carla Pedreño |
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Rok vydání: | 2016 |
Předmět: |
Adult
Male Psychosis medicine.medical_specialty Adolescent Pyramidal Tracts Audiology Schizotypal Personality Disorder White matter Young Adult 03 medical and health sciences 0302 clinical medicine Schizoid personality disorder Physiology (medical) mental disorders medicine Humans Psychiatry medicine.diagnostic_test General Neuroscience Magnetic resonance imaging Cognition medicine.disease Magnetic Resonance Imaging White Matter Personality disorders Schizotypal personality disorder 030227 psychiatry Neuropsychology and Physiological Psychology medicine.anatomical_structure Endophenotype Female Psychology 030217 neurology & neurosurgery |
Zdroj: | International Journal of Psychophysiology. 110:163-170 |
ISSN: | 0167-8760 |
Popis: | Aim Schizoid (ScPD) and Schizotypal (SPD) personality disorders are rare and severe disorders. They are associated with high liability to schizophrenia and present an attenuated form of its negative symptoms, which are considered a putative endophenotype for schizophrenia. The trans-diagnostic study of negative symptoms in non-psychotic populations such as ScPD/SPD might provide useful markers of a negative-symptom domain; however, little is known about their neurobiological substrates. The aim of the study was to investigate differences in gray and white matter volumes in subjects with ScPD/SPD compared to a group of healthy controls. Methods Structural magnetic resonance images were obtained from 20 never-psychotic subjects with ScPD/SPD and 28 healthy controls. Resulting values from clusters of differences were correlated in patients with relevant clinical variables (O-LIFE scale). Results ScPD/SPD presented greater bilateral white matter volume compared to healthy controls in the superior part of the corona radiata, close to motor/premotor regions, which correlated with the O-LIFE subtest of cognitive disorganization. No differences were found in regional gray matter or global gray/white matter volumes. Conclusion Greater volumes in motor pathways might relate to cognitive symptoms and motor alterations commonly present in schizophrenia-related disorders. Given the established link between motor signs and psychosis, structural alterations in motor pathways are suggested as a putative biomarker of a negative-symptom domain in psychosis subject to further testing. |
Databáze: | OpenAIRE |
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