The variation of the basal arteries of the brain : Their frequency, laterality, and clinical significance in cerebral angiography
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概要
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The variation of the basal arteries of the brain were studied using 1, 017 autopsied cases of the aged. The results were as follows;<BR>1) Anterior cerebral artery (ACA) : The calibers of the left and right ACAs were significantly differenat, one was two or more times greater than another, in 57 cases (5.6%). In 38 cases (3.8%) the left was greater, while in 19 cases (1.9%) the right was greater.<BR>The hypoplasias of the pre-communical segments of the ACAs were found in 57 cases (5.7%), 12 in the left and 45 in the right.<BR>2) Anterior communicating artery : It had been reported that the variations of the anterior communicating arteries, such as Y-form and net formation, were more frequent in Japanese than in Western population. However, the present results reviealed that no significant difference did present between the two.<BR>3) Posterior cerebral artery (PCA) and posterior communicating artery (PComA) : In 307 PCAs (15.1%), the caliber of the PComA was far more greater than that of the pre-communical segment of the PCA (foetal type).<BR>The calibers of the pre-communical segment of the PCA and the PComA were almost equal in 214 PCAs (10.5%) (transitional type).<BR>The incidence of the cases with foetal types of the PCAs bilaterally (primitive type) was greater (77 cases, 7.6%) than the results reported from western countries (3.6%).<BR>4) Vertebral artery (VA) : The significant difference in the calibers between left and right VAs, one was two or more times greater than another, was found in 282 cases (27.7%). In 187 cases (18.4%) the left was greater, in 64 cases (6.3%) the right was greater.<BR>The hypoplasias of the VAs were found in 7 cases (0.7%), 3 in the left and 4 in the right.<BR>The VAs, terminated in the posterior cerebeller artery without jointing basilar artery, were found in 14 cases (1.4%), 6 in the left and 8 in the right.
- 一般社団法人 日本脳卒中学会の論文
一般社団法人 日本脳卒中学会 | 論文
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