Abstract
We report a case of cerebral infarction caused by occlusion of a median callosal artery. A 55-year-old man was admitted to our hospital because of right motor weakness and sensory disturbance, and disorientation, followed by sensory disturbance of the left upper limb, and motor weakness of the left lower leg. Diffusion weighted images of MRI demonstrated high intensity over an extended area of the corpus callosum and bilateral medial parietal cortex. T1, T2 weighted and FLAIR images revealed a thrombus in the median callosal artery as hyperintensity spots. On comparison with MRA images obtained in a previous stroke attack, occlusion of the median callosal artery was identified in the new MRA series. The patient developed intermanual conflicts and compulsive manipulation in both arms, motor apraxia and constructive disorder in the right hand, and sensory misperception and ideomotor apraxia in the left hand. These symptoms were considered to represent callosal alien hand signs mixed with posterior alien hand signs in the left hand, and anterior alien hand signs in the right hand. Since the median callosal artery makes various contributions to the blood supply of the corpus callosum and bilateral hemispheres, it is important to investigate both the neurological symptoms and neuroradiological findings carefully in detail.
