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Asymmetric intra and inter-hemispheric subcellular rat brain correlation of arginyl-aminopeptidase activity during development and aging.
Brain Res
December 2024
Department of Physiology, Faculty of Medicine, University of Granada, Granada 18071, Spain.
The functional significance of brain asymmetry is still largely unknown. Studying the level of correlation of neuropeptide-degrading activities between subcellular fractions such as synaptosomal, of the left and right hemispheres of male rats during development and aging could provide relevant data on their functional role during these periods. The present study analyzes the level of correlation of a enkephalin- or angiotensin III-degrading activity, such as membrane-bound arginyl-aminopeptidase activity (M-B ArgAP) between the left versus right homogenate and/or synaptosomal subcellular fractions obtained and processed independently from both brain hemispheres during development and aging.
View Article and Find Full Text PDFUnderstanding perioperative risk determinants in carotid endarterectomy: the impact of compromised circle of Willis morphology on inter-hemispheric blood flow indices based on intraoperative internal carotid artery stump pulse pressure and backflow patterns.
Geroscience
October 2024
Research Center for Sport Physiology, Hungarian University of Sports Science, Budapest, 1123, Hungary.
Carotid artery stenosis (CAS) often requires surgical intervention through carotid endarterectomy (CEA) to prevent stroke. Accurate cerebrovascular risk assessments are crucial in CEA, as poor collateral circulation can lead to insufficient interhemispheric blood flow compensation, resulting in ischemic complications. Therefore, understanding perioperative risk determinants is vital.
View Article and Find Full Text PDFDivergent pattern of functional connectivity within the dorsal attention network differentiates schizophrenia and bipolar disorder patients.
Front Psychiatry
September 2024
Department of Affective Disorders, Jagiellonian University Medical College, Kraków, Poland.
Introduction: Schizophrenia (SZ) and bipolar disorder (BD) share common clinical features, symptoms, and neurocognitive deficits, which results in common misdiagnosis. Recently, it has been suggested that alterations within brain networks associated with perceptual organization yield potential to distinguish SZ and BD individuals. The aim of our study was to evaluate whether functional connectivity (FC) of the dorsal attention network (DAN) may differentiate both conditions.
View Article and Find Full Text PDFEnlarged brain perivascular spaces correlate with blood plasma osmolality in the healthy population: A longitudinal study.
Neuroimage
October 2024
Department of Anatomy, Third Faculty of Medicine, Charles University, Prague, Czechia; National Institute of Mental Health, Klecany, Czechia.
Enlarged perivascular spaces (EPVS) are increasingly recognized as an MRI detectable feature of neuroinflammatory processes and age-related neurodegenerative changes. Understanding perivascular characteristics in healthy individuals is crucial for their applicability as a reference for pathological changes. Limited data exists on the EPVS load and interhemispheric asymmetry in distribution among young healthy subjects.
View Article and Find Full Text PDFQuantitative phenotyping of verbal and non-verbal cognitive impairment using diffusion-weighted MRI connectome: Preliminary study of the crowding effect in children with left hemispheric epilepsy.
Epilepsy Behav
November 2024
Department of Pediatrics, Wayne State University, Detroit, MI, United States; Translational Imaging Laboratory, University Health Center, Detroit, MI, United States; Department of Neurology, Wayne State University, Detroit, MI, United States; Translational Neuroscience Program, Wayne State University, Detroit, MI, United States.
The "crowding" effect (CE), wherein verbal functions are preserved presumably at the expense of nonverbal functions, which diminish following inter-hemispheric transfer of language functions, is recognized as a specific aspect of functional reorganization, offering an insight about neural plasticity in children with neural insult to the dominant hemisphere. CE is hypothesized as a marker for language preservation or improvement after left-hemispheric injury, yet it remains challenging to fully discern it in preoperative evaluation. We present a novel DWI connectome (DWIC) approach to predict the presence of CE in 24 drug-resistant epilepsy (DRE) patients with a left-hemispheric focus and 29 young healthy controls.
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