Involvement of the right inferior longitudinal fascicle in visual hemiagnosia: A brain stimulation mapping study - Case report

Alejandro Fernández Coello, Sophie Duvaux, Alessandro De Benedictis, Ryosuke Matsuda, Hugues Duffau

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish
Pages (from-to)202-205
Number of pages4
JournalJournal of Neurosurgery
Volume118
Issue number1
DOIs
Publication statusPublished - Jan 2013

Keywords

  • Diagnostic and operative techniques
  • Direct brain stimulation
  • Inferior longitudinal fascicle
  • Visual hemiagnosia

ASJC Scopus subject areas

  • Clinical Neurology
  • Surgery

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