PMID: 16509106Mar 3, 2006Paper

Right unilateral jargonagraphia as a symptom of callosal disconnection

Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
Nami IhoriMitsuru Kawamura

Abstract

We report the case of a right-handed patient who exhibited right unilateral jargonagraphia after a traumatic callosal hemorrhage. The lesions involved the entire corpus callosum, except for the lower part of the genu and the splenium. The patient's right unilateral jargonagraphia was characterized by neologisms and perseveration in kanji and kana, and was more prominent in kana than kanji. The jargonagraphia was similar to that observed in crossed aphasia, except that agraphia occurred only with the right hand. The patient also showed right unilateral tactile anomia and right tactile alexia, along with right-ear extinction on a dichotic listening test for verbal stimuli, which suggested that language function was lateralized to the right hemisphere. Since this patient had learned to write with his right hand, kinesthetic images of characters were thought to be formed and stored dominantly in the left hemisphere. We suggest that the callosal lesions disturbed the interhemispheric transfer of information for the dual-route procedures for writing in the right hemisphere, allowing the kinesthetic images of characters stored in the left hemisphere to be processed freely, resulting in the right unilateral jargonagraphia. At least two...Continue Reading

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Citations

Oct 19, 2011·Clinical Neurology and Neurosurgery·Masatoshi IshizakiMakoto Uchino
Nov 26, 2015·Journal of Clinical Neuroscience : Official Journal of the Neurosurgical Society of Australasia·Yoshiko KurosakiKazuo Hadano
Aug 19, 2008·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·Sergio Della Sala, Joanna Brooks

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