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September 1982

Reversed Cerebral Asymmetries

Author Affiliations

Aphasia Research Center Department of Neurology Boston University School of Medicine and Boston Veterans Administration Medical Center 150 S Huntington Ave Boston, MA 02130

Arch Neurol. 1982;39(9):601. doi:10.1001/archneur.1982.00510210071026

To the Editor.—  Selnes et al (Archives 1982;39:122-126) presented an unusual case report of a patient with only transient aphasia, but with persistent ideomotor apraxia following a massive left-hemisphere stroke. The authors suggested that this was a case of mixed dominance.Hemispheric asymmetries have been measured on computed tomographic (CT) scans in both right- and left-handed normal controls. LeMay1 reported that 78% of right-handers have an increased left occipital length, whereas this is present in only 37% of left-handers. Chui and Damasio2 reported that the majority of both right- and left-handers have an increased left occipital length and width. Recent research in our laboratory also suggests that the most common CT scan hemispheric asymmetry pattern is increased left occipital width and/or length. Increased left occipital horn length,3 left planum temporale size,4 and left temporoparietal cytoarchitectonic area5 have been reported also.The CT scan hemispheric asymmetries

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