Residual neurovascular function and retinotopy in a case of hemianopia
Yi-Ching Ho1, Amandine Cheze, Yih-Yian Sitoh
1Department of Neuroradiology, National Neuroscience Institute, Singapore.
Introduction:
For occipital cortex strokes resulting in vision disorders, questions about the viability of residual visual cortex remain.
Clinical Picture:
In a patient with a one-year-old, left, complete, homonymous hemianopia due to a right, posterior cerebral artery, ischaemic infarct, we assessed the visual cortex with fMRI retinotopic mapping prior to starting vision restoration therapy.
Outcome:
The patient was found to have residual neurovascular function and retinotopic representation in the surviving visual cortex around the infarcted area.
Conclusion:
The ability to respond to stimuli in part of the blind field, though not consciously perceived, suggests the potential for recovery.
