Sjögren's syndrome (SS) is an autoimmune epithelitis characterized by lymphocytic infiltration of exocrine glands and epithelia in multiple sites. One third of the patients present with peripheral nervous system involvement. We describe the case of a woman aged 62 affected by a peroneal nerve mononeuropathy with painful disturbances secondary to a prevalent involvement of small fibers as demonstrated by electrophysiological investigations and skin biopsy. Asymmetric peripheral nerve involvement is not uncommon in SS, though, to our knowledge, it has never been reported of a mononeuropathy involving primarily small fibers.
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Alzheimers Dement
December 2024
Laboratory of FMRI Technology (LOFT), Mark & Mary Stevens Neuroimaging and Informatics Institute, University of Southern California, Los Angeles, CA, USA.
Background: To validate the index of diffusivity along the perivascular space (ALPS index) as a biomarker for vascular cognitive impairment and dementia (VCID).
Method: The participants and MRI data used in this study were acquired as part of the MarkVCID consortium, which consisted of seven sites. A total of 578 participants (72.
Alzheimers Dement
December 2024
University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.
Background: The common marmoset (Callithrix jacchus) is an important animal model in neuroscience and neurological diseases (e.g., Alzheimer's disease - AD), as they present primate-specific evolutionary features such as an expanded frontal cortex.
View Article and Find Full Text PDFAlzheimers Dement
December 2024
Munich Cluster for Systems Neurology (SyNergy), Munich, Bavaria, Germany.
Background: Memory clinic patients typically present with Alzheimer's disease (AD) and cerebral small vessel disease (SVD) to varying degrees. Therefore, it is crucial to determine the etiology of cognitive deficits for facilitating patient-centered treatment in memory clinics. Plasma biomarkers (ptau, Glial Fibrillary Acidic Protein [GFAP], Neurofilament light chain [NfL]) and fixel-based advanced diffusion MRI markers (fiber density, fiber-bundle cross-section) show potential towards disentangling AD- and SVD-related brain changes (Dewenter et al.
View Article and Find Full Text PDFBackground: White matter hyperintensities (WMHs) are age-related radiological abnormalities indicative of small vessel disease. It is unclear if WMHs in different regions represent similar pathophysiology and etiology. Here, we developed a framework to estimate WMH pathophysiology in vivo, which allowed us to precisely characterize spatial patterns of WMH tissue alterations associated with four disorders.
View Article and Find Full Text PDFAlzheimers Dement
December 2024
University of Gothenburg, The Sahlgrenska Academy, Institute of Neuroscience and Physiology, Psychiatry and Neurochemistry, Gothenburg, Sweden.
Background: Memory clinic patients typically present with Alzheimer's disease (AD) and cerebral small vessel disease (SVD) to varying degrees. Therefore, it is crucial to determine the etiology of cognitive deficits for facilitating patient-centered treatment in memory clinics. Plasma biomarkers (ptau217, Glial Fibrillary Acidic Protein [GFAP], Neurofilament light chain [NfL]) and fixel-based advanced diffusion MRI markers (fiber density, fiber-bundle cross-section) show potential towards disentangling AD- and SVD-related brain changes (Dewenter et al.
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