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  • Title: Involvement of the right inferior longitudinal fascicle in visual hemiagnosia: a brain stimulation mapping study.
    Author: Fernández Coello A, Duvaux S, De Benedictis A, Matsuda R, Duffau H.
    Journal: J Neurosurg; 2013 Jan; 118(1):202-5. PubMed ID: 23140150.
    Abstract:
    Neural foundations underlying visual agnosia are poorly understood. The authors present the case of a patient who underwent awake surgery for a right basal temporooccipital low-grade glioma in which direct electrostimulation was used both at the cortical and subcortical level. Brain mapping over the inferior longitudinal fascicle generated contralateral visual hemiagnosia. These original findings are in agreement with recent tractography data that have confirmed the existence of an occipitotemporal pathway connecting occipital visual input to higher-level processing in temporal lobe structures. This is the first report of a true transient visual hemiagnosia elicited through electrostimulation, supporting the crucial role of inferior longitudinal fascicle in visual recognition.
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