circle of Willis

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  • noun

Words related to circle of Willis

a ring of arteries at the base of the brain

References in periodicals archive ?
There was no significant association with any variant of the AComA and any other anatomical variant in the anterior circulation of the cerebral arterial circle in the same patient.
The presence of anatomic variants characterized by the lack of collateral circulation increase the risk of ischemic events and a correlation between some anatomical variants of the cerebral arterial circle and the development of aneurysms lias been established (Dimmick & Faulder; Li et al.
Previous studies have found a significant difference in the prevalence of anatomical variants of the cerebral arterial circle among different ethnic groups (De Silva et al, 2009; Klimek-Piotrowska et al.
Variability of the components is observed that they constitute the cerebral arterial circle when is considered: side, sex and cephalic index
SUMMARY: Thirteen brains of wild boar (Sus scrofa scrofa) were investigated with the purpose to discrebe the formation and the branchings of the brain arterial circle and basilar artery, from injetions of colored latex into the arteries of the base of the brain, and to establish the degree of correlativity between the rostro-caudal, latero-lateral lengths, weight, volume, carotid and basilar arteries diameter and the length of the basilar artery.
The Veterinary Anatomical Nomina (1999) describes the swine encephalon base arteries as a circle, and calls it the brain arterial circle or Willis.