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Left Unilateral Ideomotor Apraxia in Ischemic Stroke within the Territory of the Anterior Cerebral Artery

“…These find ings suggest the possibility that lesions in the left ACA territory' might be more prone to cause LUIMA than right ones and that callosal lesions of the left side may interrupt the commissural fibers from the left hemisphere to the right one more tightly than right lesions. However, this hypothesis remains tentative since several authors have reported cases of LUIMA caused by cerebral infarction in the right ACA territory [2][3][4], Our attention was focused simply on LUIMA in the present study. Further investigations are needed to eluci date the callosal areas which are most relevant to the signs of disconnection syndrome.…”

“…The principal signs of interhemispheric disconnection caused by cerebral infarction in the ACA territory consist of LUIMA, left-sided agraphia and left-sided tactile anomia. Since the description by Liepmann and Maas [ 1 ], many cases of ischemic stroke in the ACA territory, which exhibited the disconnection syndrome have been re ported [2][3][4][5][6][7][8][9][10]. The ACA supplies the entire mesial surface of the frontal and parietal lobes and the anterior fourfifths of the corpus callosum.…”

“…LUIMA was absent in 5 other patients with left ACA infarction invading only the anterior half of the corpus callosum. The posterior trunk of the corpus callosum may thus be most crucial for the manifestation of LUIMA.The interhemispheric disconnection syndrome results from a wide variety of etiologies, such as ischemic stroke in the territory of the anterior cerebral artery (ACA) [1][2][3][4][5][6][7][8][9][10] [ 19,20]. The heterogeneity of causative diseases renders it difficult to determine the areas which contribute most to the manifestations of the disconnection syndrome.…”