Abstract
Cerebral infarction in the region of the anterior cerebral artery is reported to be rare, accounting for less than 5% of all cerebral infarction patients. The supplementary motor area (SMA) is located in the anterior cerebral artery region, and it is known that the left and right supplementary motor areas communicate and coordinate through the corpus callosum. Disorders of the supplementary motor area cause SMA syndrome, which is characterized by transient pa- ralysis followed by rapid recovery and is typically associated with tumors or their resection, but is rarely seen in in- farction cases. We report a case of a 75-year-old patient with type 2 diabetes who developed SMA syndrome due to a cerebral infarction in the right SMA.
This patient showed bilateral neurological symptoms rather than unilateral neurological symptoms as previously re- ported. It has been reported that interhemispheric interaction via the corpus callosum is essential for the recovery of supplementary motor cortex syndrome. In this case, the cerebral infarction itself was only in the right cerebral hemi- sphere, but this interaction may have temporarily caused bilateral symptoms, after which improvement followed.
