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Updated: May 9, 2026

Functional Magnetic Resonance Imaging (fMRI) of the Visual Cortex with Wide-View Retinotopic Stimulation
Published on: December 8, 2023
Imaging of the optic chiasm and retrochiasmal visual pathways
N Menjot de Champfleur1, S Menjot de Champfleur, D Galanaud
1Service de Neuroradiologie, Hôpital Gui-de-Chauliac, CHRU de Montpellier, 80, avenue Augustin-Fliche, 34295 Montpellier cedex 5, France.
Abstract:
The exploration of the chiasmal and retrochiasmal visual pathways is based on magnetic resonance imaging. A bitemporal hemianopsis suggests a lesion of the optic chiasm while homonymous lateral hemianopsis should lead to a search for a lesion of the retrochiasmal visual pathways. The causes of chiasmal impairment are mainly tumoral. The exploration protocol is based on MRI with T1-weighted sagittal sections, then T2- and T1-weighted coronal sections with and without injection. In case of a retrochiasmal syndrome, the MRI exploration protocol is a function of the type of occurrence of the deficiency and the context.
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