Reading and/or writing disorder caused by thalamic lesion

Abstract

Patient with brain injury at thalamus has not only the neurological symptoms such as motor paralysis or sensory impairment, but also a variety of neuropsychological symptoms such as aphasia, unilateral spatial neglect, and memory impairment. On the other hand, few cases who had reading and writing disorder without aphasia has been reported. Dorsomedial nucleus and the outer ventral nucleus, posterolateral ventral nucleus, which is projected to motor and sensory areas on the cerebral cortex, is known as the thalamus of the localized lesions caused the disorders of reading and writing. SPECT in some study shows a decrease in regional cerebral blood flow in the frontal, temporal, and parietal lobe of the same side as a function lesion.