Variations in the brain circulation: the circle of Willis
Braz. j. morphol. sci
; 29(4): 243-247, oct.-dec. 2012. ilus, graf
Article
em En
| LILACS
| ID: lil-665184
Biblioteca responsável:
BR734.1
ABSTRACT
Introduction:
Despite being quite common, there is little information concerning the Brazilian population on anatomic variations and anomalies in the brain circulation. This study intends to describe the most common variations found during the autopsies for the AMA Study. Material andmethods:
Fifty cadavers had their circle of Willis dissected and analyzed.Results:
54% presented at least one variation, and they were more common in the posterior circulation (88.5%) and on the right side of the brain (59.7%); non-classical morphology was more common bilaterally and in the posterior circulation of the circle of Willis (37.1%). The most common finding was the absence of the posterior communicating artery (32%), followed by posterior cerebral arteries originated from the internal carotid artery (18%). There were no variations in the middle cerebral arteries. Accessory anterior cerebral arteries were present in 6%, and A1 segment hypoplasia was present in only 2% of the cases.Conclusion:
Brazilian population variations are in accordance with the literature and there seems to be no difference between races in the variation of brain circulation.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
LILACS
Assunto principal:
Artérias Cerebrais
/
Circulação Cerebrovascular
/
Círculo Arterial do Cérebro
/
Cérebro
Limite:
Female
/
Humans
/
Male
País/Região como assunto:
America do sul
/
Brasil
Idioma:
En
Revista:
Braz. j. morphol. sci
Assunto da revista:
ANATOMIA
Ano de publicação:
2012
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Brasil