Hippocampal abnormalities are an established finding in the neuroimaging study of schizophrenia. However, no studies have examined the possibility of regional hippocampal abnormalities specific to deficit schizophrenia (DS) and associations with the unique symptoms of this schizophrenia subtype. This study compared 33 DS and 39 non-deficit schizophrenia (NDS) patients and 38 healthy subjects for hippocampal subfield volumetry. Clinical symptoms were assessed by PANSS, cognition by the neurocognitive battery on the day of the MRI scan. The automatic hippocampal segmentation were preprocesses use FreeSurfer 7.2.0. Unfortunately, the associations between neurocognitive scores and hippocampal subfield volumes in the DS group were not significant after the Bonferroni correction. Our results did not support a causal relationship between hippocampal subregional atrophy and cognitive deficits in DS.
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http://dx.doi.org/10.1038/s41537-023-00354-z | DOI Listing |
Transl Psychiatry
January 2025
Research Center Juelich, Institute of Neuroscience and Medicine 10, Research Center Juelich, Juelich, Germany.
Genetic variation in the α5 nicotinic acetylcholine receptor (nAChR) subunit of mice results in behavioral deficits linked to the prefrontal cortex (PFC). rs16969968 is the primary Single Nucleotide Polymorphism (SNP) in CHRNA5 strongly associated with nicotine dependence and schizophrenia in humans. We performed single cell-electrophysiology combined with morphological reconstructions on layer 6 (L6) excitatory neurons in the medial PFC (mPFC) of wild type (WT) rats, rats carrying the human coding polymorphism rs16969968 in Chrna5 and α5 knockout (KO) rats.
View Article and Find Full Text PDFClin Psychopharmacol Neurosci
February 2025
Department of Psychiatry, Pamukkale University, Denizli, Türkiye.
Objective: Bipolar disorder (BD), schizoaffective disorder (SAD), and schizophrenia (SCH) are psychiatric disorders characterized by persistent cognitive impairments, even during periods of remission. Psychotropic medications commonly used to manage these conditions have anticholinergic properties, which may contribute to cognitive impairment.
Methods: This study examined the relationship between anticholinergic medication burden and cognitive function in individuals diagnosed with BD, SAD, and SCH.
Schizophrenia (Heidelb)
January 2025
Department of Psychiatry, Psychotherapy and Psychosomatics, Faculty of Medicine, RWTH Aachen, Aachen, Germany.
Facial stimuli are relevant social cues for humans and essential signals for adequate social interaction. Impairments in face processing are well-documented in schizophrenia and linked to symptomatology, yet the underlying neural dynamics remain unclear. Here, we investigated the processing and underlying neural temporal dynamics of task-irrelevant emotional face stimuli using combined EEG/fMRI in 14 individuals with schizophrenia and 14 matched healthy controls.
View Article and Find Full Text PDFSleep Adv
December 2024
Department of Psychiatry, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.
Study Objectives: Sleep spindles, defining electroencephalographic oscillations of nonrapid eye movement (NREM) stage 2 sleep (N2), mediate sleep-dependent memory consolidation (SDMC). Spindles are also thought to protect sleep continuity by suppressing thalamocortical sensory relay. Schizophrenia is characterized by spindle deficits and a correlated reduction of SDMC.
View Article and Find Full Text PDFTransl Psychiatry
January 2025
Department of Basic Clinical Practice, University of Barcelona, Barcelona, Spain.
Schizophrenia (SZ) is a deleterious brain disorder characterised by its heterogeneity and complex symptomatology consisting of positive, negative and cognitive deficits. Current antipsychotic drugs ameliorate the positive symptomatology, but are inefficient in treating the negative symptomatology and cognitive deficits. The neurodevelopmental glutamate hypothesis of SZ has opened new avenues in the development of drugs targeting the glutamatergic system.
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