Cognitive dysfunction constitutes a core characteristic of schizophrenia spectrum disorders (SZ). Specifically, deficits in updating generative models (i.e., cognitive flexibility) and shielding against distractions (i.e., cognitive stability) are considered critical contributors to cognitive impairment in these patients. Here, we examined the structural integrity of frontostriatal networks and their associations with reduced cognitive stability and flexibility in SZ patients. In a sample of 21 patients diagnosed with SZ and 22 healthy controls, we measured gray matter volume (GMV) using structural MRI. Further, cognitive stability and flexibility were assessed using a switch-drift paradigm, quantifying the successful ignoring of distracters and detection of rule switches. Compared to controls, patients showed significantly smaller GMV in the whole brain and three predefined regions of interest: the medial prefrontal cortex (mPFC), inferior frontal gyrus (IFG), and caudate nucleus (CN). Notably, GMV in these areas positively correlated with correct rule-switch detection but not with ignoring rule-compatible drifts. Further, the volumetric differences between SZ patients and controls were statistically explainable by considering the behavioral performance in the switch-drift task. Our results indicate that morphological abnormalities in frontostriatal networks are associated with deficient flexibility in SZ patients and highlight the necessity of minimizing neurodevelopmental and progressive brain atrophy in this population.
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http://dx.doi.org/10.1111/psyp.14596 | DOI Listing |
Appl Ergon
January 2025
Universität der Bundeswehr München, Werner-Heisenberg-Weg 39, 85579, Neubiberg, Germany.
Managing multiple tasks simultaneously often results in performance decrements due to limited cognitive resources. Task prioritization, requiring effective cognitive control, is a strategy to mitigate these effects and is influenced by the stability-flexibility dilemma. While previous studies have investigated the stability-flexibility dilemma in fully manual multitasking environments, this study explores how cognitive control modes interact with automation reliability.
View Article and Find Full Text PDFAnat Sci Educ
January 2025
Department of Anatomy and Cell Biology, Rush University, Chicago, Illinois, USA.
Negative attitudes toward persons with disabilities (PWDs) can lead to stigmatization and exclusion, underscoring the need for effective tools to measure and address such attitudes in educational settings. This study compares the psychometric properties of two scales used to assess attitudes toward PWDs among health science learners: the Multidimensional Attitudes Scale Toward Persons with Disabilities (MAS) and the Attitudes and Perspectives Toward Persons with Disabilities Scale (APPD). This research examines the internal consistency, factor stability, factor replicability, and convergent validity of these scales across different measurement occasions using data from second-year Medical (n = 102) and Doctor of Physical Therapy (n = 39) students.
View Article and Find Full Text PDFSci Data
January 2025
Lab for Autonomic Neuroscience, Imaging and Cognition (LANIC), Department of Psychosomatic Medicine and Psychotherapy, Jena University Hospital, Jena, Germany.
Heart rate variability (HRV) is a key indicator of cardiac autonomic function, making reliable assessment crucial. To examine the test-retest stability of resting HRV in healthy individuals, fifty participants attended two lab sessions within a week, at the same time of day. After a 5-minute acclimatization period, electrocardiogram and respiration were recorded at rest.
View Article and Find Full Text PDFNeuromolecular Med
January 2025
Department of Neurology, Puren Hospital Affliated to Wuhan University of Science and Technology, No. 1, Benxi Street, Wuhan City, 430081, Hubei Province, China.
Sleep deprivation (SD) impairs learning and memory. Investigating the role of epigenetic modifications, such as 5-methylcytosine (mC), in SD is crucial. This study established an SD mouse model and assessed the mRNA levels of mC-related genes in brain tissue to identify potential candidates.
View Article and Find Full Text PDFSci Rep
January 2025
Department of urinary surgery, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, Zhengzhou, 450003, Henan, China.
Alexithymia, a cognitive and emotional deficit characterized by difficulty in expressing emotions and identifying feelings, poses significant challenges in healthcare settings. Developing a reliable and valid tool to measure alexithymia in post-prostatectomy patients would not only aid healthcare professionals in identifying at-risk individuals but also facilitate early intervention and targeted support. This study aimed to translate the Brief Form of the Normative Male Alexithymia Scale (NMAS-BF) into Simplified Chinese, evaluate the reliability and validity of the Chinese version, and explore its influencing factors.
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