S Sheetal, Mathew Robert, P Byju
Senior Lecturer in Neurology.
Professor of Neurology.
J Assoc Physicians India. 2019 Jul;67(7):78-80.
Alexia without agraphia (also called pure alexia or word blindness) was the first of the disconnection syndromes to be described. It results from the loss of visual input to the language area without involvement of the language area. The most common cause is occlusion of the left posterior cerebral artery with involvement of left occipital cortex and the splenium of corpus callosum. However, it can also be caused by any lesion affecting the splenium of corpus callosum disrupting the white matter tracts from the left visual cortex to the angular gyrus. We hereby describe five cases of alexia without agraphia, of which three are due to involvement of the left occipital cortex and splenium, and two are due to involvement of the splenium of corpus callosum alone.
失写症性失读症（也称为纯失读症或词盲）是最早被描述的分离综合征。它是由于语言区域失去视觉输入而语言区域未受影响所致。最常见的原因是左侧大脑后动脉闭塞，累及左侧枕叶皮质和胼胝体压部。然而，它也可能由任何影响胼胝体压部的病变引起，这些病变会破坏从左侧视觉皮质到角回的白质束。我们在此描述五例失写症性失读症病例，其中三例是由于左侧枕叶皮质和胼胝体压部受累，两例仅由于胼胝体压部受累。
