World Neurosurg
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Recently, somatosensory cortex stimulation has been proposed as a possible treatment for neuropathic deafferentation pain, based on a simple 4-step concept: (1) pain is associated with increased activity in the somatosensory cortex, (2) allodynia-evoked blood-oxygen-level dependence functional magnetic resonance imaging (fMRI) activation depicts the area involved in the pain, (3) if fMRI-guided, neuronavigation-based transcranial magnetic stimulation can transiently suppress the pain, then (4) an extradural electrode can be implanted targeting the same area. ⋯ Combining fMRI and PET scanning can potentially demonstrate continuing map plasticity under progressive somatosensory deafferentation. The functional imaging data can be used as target for pathophysiology-based somatosensory cortex stimulation.
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To assess the safety of the suprabrow approach (SBCA) for aneurysm surgery by comparing intraoperative rupture rates with those for the standard pterional approach. ⋯ The rate of intraoperative rupture is significantly higher when ruptured aneurysms are operated with the SBCA (in comparison to the pterional approach). However, the SBCA may be safer for unruptured and middle cerebral artery aneurysms with a lower rate of IOR.
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During the past decade, endoscopic intraventricular and skull base operations have become widely used for a variety of evolving indications. A global survey of practicing endoscopic neurosurgeons was performed to characterize patterns of usage regarding endoscopy equipment, instrumentation, and the indications for using image-guided surgery systems (IGSs). ⋯ Many variations and permutations for performing intraventricular and skull base endoscopic surgery exist worldwide. Much can be learned by studying the patterns and indications for using various types of equipment and operative adjuncts such as IGSs.
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Observational Study
Accuracy of computed tomography angiography in the diagnosis of intracranial aneurysms.
Although digital subtraction angiography (DSA) remains the standard for intracranial aneurysm diagnosis, computed tomography angiography (CTA) is being increasingly used for this purpose. CTA has sensitivities and specificities reported as high as 97% and 100%, respectively. We analyzed a prospective cohort of 112 patients with 134 unruptured aneurysms who underwent community CTAs and confirmatory DSAs in a tertiary facility. ⋯ The CTA accuracy rate may be lower than previously reported. CTA is particularly inaccurate in aneurysms 5 mm or smaller and those in the ACoA region.