Journal of neuroimaging : official journal of the American Society of Neuroimaging
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Comparative Study Controlled Clinical Trial
Brain atrophy in radiologically isolated syndromes.
The aim of this study was to compare brain atrophy in radiologically isolated syndrome (RIS), in clinically isolated syndrome (CIS), and in individuals with subjective complaints (ISC). ⋯ NTBV and NCV were significantly lower in RIS compared with ISC while no differences were observed in NWMV.
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To investigate the impact of regression methods on resting-state functional magnetic resonance imaging (rsfMRI). During rsfMRI preprocessing, regression analysis is considered effective for reducing the interference of physiological noise on the signal time course. However, it is unclear whether the regression method benefits rsfMRI analysis. ⋯ rsfMRI data processed using regression should be interpreted carefully. The significance of the anticorrelated brain areas produced by global signal removal is unclear.
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Case Reports
Iatrogenic pseudoaneurysm of the middle meningeal artery after external ventricular drain placement.
External ventricular drain (EVD) placement is often a routine but lifesaving neurosurgical procedure performed throughout the world. Misadventures involving the procedure are well documented throughout the literature. However, we present a unique case of middle meningeal artery pseudoaneurysm formation after EVD placement not before described and provide a review of the literature.
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We report two cases of posterior reversible encephalopathy syndrome (PRES) occurring in association with supra-therapeutic serum lithium levels. Although the neurologic manifestations of lithium toxicity are well known, this is, to our knowledge, the first report describing a link between lithium toxicity and PRES. We discuss the current understanding of the pathogenesis of PRES and suggest mechanisms by which lithium may play a role in its development.
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Basilar artery stenosis where flow restriction constitutes the main pathomechanism are exceptional. Here, we report a case where the lesion progression was characterized by watershed infarct between the anterior inferior-superior cerebellar arteries and deep pontine arteries, indicating a significant hemodynamic impairment.