Clinical neurology and neurosurgery
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Clin Neurol Neurosurg · Sep 2009
Evidence for an occipito-temporal tract underlying visual recognition in picture naming.
A 24-year-old male underwent awake surgery for a lesion in the left dominant basal temporo-occipital junction. During the intraoperative functional mapping using picture naming, cortical stimulation near the visual word form area led to visual paraphasia. These visual paraphasias were also elicited axonally by subcortical stimulation at the anterior wall of the cavity. ⋯ We suggest that its afference, whose stimulation also induced visual paraphasias, may be one part of the U-shaped fibers distributed along the posterior part of the occipito-temporal connection system (inferior longitudinal fasciculus). Preservation of this white matter tract is essential for visual recognition. Thus, it should be mapped intraoperatively more systematically.
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Clin Neurol Neurosurg · Sep 2009
Case ReportsDelayed coma in head injury: consider cerebral fat embolism.
To describe a case of a young man with delayed coma after mild head injury, suggestive of cerebral fat embolism (CFE). To underline the value of MR imaging in the differential diagnosis of secondary deterioration in mild head injury. ⋯ In head injured patients with long bone fractures one should consider cerebral fat embolism. When the classical clinical syndrome is not present, MR imaging is warranted for diagnosis and to exclude other causes of secondary deterioration.
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Clin Neurol Neurosurg · Sep 2009
Endoscopic biopsy of foramen of Monro and third ventricle lesions guided by frameless neuronavigation: usefulness and limitations.
To describe our institution experience regarding the usefulness and limitations of frameless neuronavigation in the endoscopic biopsy of foramen of Monro and third ventricle lesions. ⋯ In our experience, image-guided neuroendoscopy can improve the accuracy of the endoscopic approach, minimising brain trauma. It can be particularly helpful when performing a brain biopsy in the absence of clear intraventricular landmarks or in the event of adverse visual conditions such as intraventricular bleeding.