A left-handed patient with a grade II left frontal lobe astrocytoma had spontaneous seizures causing speech arrest and uncontrolled right upper extremity movements. Word-generation functional MR (fMR) imaging showed activity nearly exclusively in the right inferior frontal gyrus. The clinical history of the speech arrest and the intraoperative mapping proved left-hemisphere language dominance. Tumor involvement of the left inferior frontal gyrus caused uncoupling of the blood oxygenation level-dependent (BOLD) and neuronal response, leading to the erroneous fMR imaging appearance of right-hemisphere language dominance. Discrepancies between BOLD and intraoperative mapping in areas near lesions illustrate the complementary nature of these techniques.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7974126 | PMC |
Publication Analysis
Top Keywords
Similar Publications
Atrial and ventricular functional mitral regurgitation: prevalence, characteristics, outcomes, and disease progression.
Eur Heart J Cardiovasc Imaging
December 2024
Department of Cardiovascular Medicine, the Heart Center, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China.
Aims: Limited data exist on the natural history of functional mitral regurgitation (FMR), including atrial (AFMR), ventricular (VFMR), and dual FMR. This study examined the prevalence, characteristics, outcomes, and progression of these FMR subtypes.
Methods And Results: Consecutive patients with ≥mild to moderate FMR were included and classified as AFMR, VFMR, or dual FMR.
Usefulness of the Slope of the Preload Recruitable Stroke Work Relationship for the Prediction of Rehospitalization After Transcatheter Mitral Edge-to-Edge Repair.
Circ J
December 2024
Department of Cardiovascular Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University.
Background: Among patients with functional mitral regurgitation (FMR), responders to transcatheter mitral edge-to-edge repair (TEER) remain unclear. We investigated whether the slope of the preload recruitable stroke work relationship (M; calculated as stroke work / [EDV - k × EDV + {1 - k} × LV wall], where EDV is end-diastolic volume, k is a constant, and LV wall is the volume of the left ventricular wall) could predict rehospitalization in FMR patients after TEER.
Methods And Results: Mwas calculated for 24 FMR patients using echocardiography.
Investigating the Tolerance of Corneal Endothelial Cells to Surgical Fluid Pressure Using Intact Porcine Eyes.
Transl Vis Sci Technol
November 2024
Department of Biomedical Engineering, University of Rochester, Rochester, NY, USA.
Purpose: It remains unclear if fluid pressures used during cataract surgeries contribute to iatrogenic corneal endothelial cell (CEC) loss.
Methods: A custom experimental platform was used to pressurize the anterior chamber of explanted porcine eyes to surgical fluid pressures of 60 mm Hg or 400 mm Hg for 5 minutes or 60 mm Hg for 45 minutes (n = 8 or 9 per group). The corneal endothelia were stained with a unique combination of nucleic acid viability dyes and were imaged using fluorescence microscopy without removing the cornea from the globe.
How I do it: Surgical interruption of high-flow dural arteriovenous fistulas at the foramen magnum region.
Acta Neurochir (Wien)
November 2024
Department of Neurosurgery, Gifu University Graduate School of Medicine, 1-1 Yanagido, Gifu, 501-1194, Japan.
Background: Dural arteriovenous fistulas (dAVFs) in the foramen magnum region (FMR) are rare entity of dAVFs. There is no established treatment for FMR-dAVFs owing to their rarity and anatomical complexity. Herein, we report cases of high-flow dAVFs located at the posteromedial part of the FMR that were successfully treated by surgical interruption.
View Article and Find Full Text PDFPotential Neuroimaging Biomarkers for Autism Spectrum Disorder: A Comprehensive Review of MR Imaging, fMR Imaging, and PET Studies.
PET Clin
January 2025
Department of Radiology, Hospital of the University of Pennsylvania, 3400 Spruce Street, Philadelphia, PA 19104, USA. Electronic address:
Autism spectrum disorder (ASD) is a characteristically heterogeneous disorder, as multiple neurodevelopmental disorders are characterized by similar symptomology and behavior. Research has shown that individuals with ASD benefit from early intervention; neuroimaging data may reveal information that cannot be obtained from traditional behavioral analysis. This review discusses the use of structural MR imaging, functional MR imaging (fMR imaging), and PET in the detection of ASD.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!