Right Hemi-Alexia

While pure alexia was long considered a disconnection syndrome, most cases are currently thought to represent a selective visual word agnosia due to damage to the visual word form area. However, disconnection is the likely explanation of hemi- alexias, particularly when splenial lesions damage inter-hemispheric projections and cause left hemi-alexia. An intra- hemispheric disconnection causing right hemi-alexia is theoretically possible but seems very rare, with only a single report that has been dismissed on the grounds of inadequate perimetry.