Abstract: The paper reported mental change measured by Hasegawa ' s method in 61 patients with cerebral hemorrhage. The rCBFs in 15 regions for each cerebral hemisphere were measured by SPECT, and the ratio of rCBF in each region of both sides was calculated. The effects of cerebral hemorrhage, rCBF and the ratio of rCBF on Hasagawa ' s score were analyzed. The results indicated that the structures related to learning and memory were destroyed by the lesions, rCBFs decreased in the left cerebral hemisphere (especially left temporal lobe, supramarginal gyrus and langular gyrus) as well as abnormal ratios of rCBF in supramarginal gyri and angular gyri, rears of superior and middle temporal gyri, and inferior temponral gyri might be the cause of mental deterioration following cerebral hemorrhage.

Key words: cerebral hemorrhage, rCBF: ratio of rCBF, mental deterioration