BACKGROUND AND PURPOSE: We have previously reported that the topographic variability of the territories of the anterior, middle, and posterior cerebral arteries is much larger than is generally considered in the literature. In the current study, we quantitatively investigated the variability of the territorial distribution of the major cerebral arteries and analyzed its relation to the variability of the circle of Willis. METHODS: In 23 human brains, the volumes of the major cerebral territories were calculated and the diameters of the contributing arteries were measured and standardized for size. RESULTS: The variability of the standardized territorial volumes proved to be considerably large and strongly correlated with the variability of the diameters of the arteries emanating from the circle of Willis. Furthermore, the relative vascular densities in the gray and white matter were determined. Taking these densities into account, an estimation of the relative peripheral resistance of the contributing arteries was made. CONCLUSIONS: We hypothesize that the morphological variability of the cerebral vascular system is related to the peripheral resistance of the major cerebral arteries and, consequently, to flow patterns, both of which are hemodynamic factors. We suggest that hemodynamic factors predominantly determine the form and size of the cerebral vascular system.
BACKGROUND AND PURPOSE: We have previously reported that the topographic variability of the territories of the anterior, middle, and posterior cerebral arteries is much larger than is generally considered in the literature. In the current study, we quantitatively investigated the variability of the territorial distribution of the major cerebral arteries and analyzed its relation to the variability of the circle of Willis. METHODS: In 23 human brains, the volumes of the major cerebral territories were calculated and the diameters of the contributing arteries were measured and standardized for size. RESULTS: The variability of the standardized territorial volumes proved to be considerably large and strongly correlated with the variability of the diameters of the arteries emanating from the circle of Willis. Furthermore, the relative vascular densities in the gray and white matter were determined. Taking these densities into account, an estimation of the relative peripheral resistance of the contributing arteries was made. CONCLUSIONS: We hypothesize that the morphological variability of the cerebral vascular system is related to the peripheral resistance of the major cerebral arteries and, consequently, to flow patterns, both of which are hemodynamic factors. We suggest that hemodynamic factors predominantly determine the form and size of the cerebral vascular system.
Authors: V Richter; M Helle; M J P van Osch; T Lindner; A S Gersing; P Tsantilas; H-H Eckstein; C Preibisch; C Zimmer Journal: AJNR Am J Neuroradiol Date: 2017-02-09 Impact factor: 3.825
Authors: Julian Schröder; Bastian Cheng; Martin Ebinger; Martin Köhrmann; Ona Wu; Dong-Wha Kang; David S Liebeskind; Thomas Tourdias; Oliver C Singer; Soren Christensen; Bruce Campbell; Marie Luby; Steven Warach; Jens Fiehler; Jochen B Fiebach; Christian Gerloff; Götz Thomalla Journal: Stroke Date: 2014-10-14 Impact factor: 7.914
Authors: Jose Gutierrez; Erin Kulick; Yeseon Park Moon; Chuanhui Dong; Ken Cheung; Bagci Ahmet; Yaakov Stern; Noam Alperin; Tatjana Rundek; Ralph L Sacco; Clinton B Wright; Mitchell S V Elkind Journal: J Int Neuropsychol Soc Date: 2017-11-23 Impact factor: 2.892
Authors: Jose Gutierrez; Sally Sultan; Ahmet Bagci; Tatjana Rundek; Noam Alperin; Mitchell S V Elkind; Ralph L Sacco; Clinton B Wright Journal: Cerebrovasc Dis Date: 2013-11-23 Impact factor: 2.762
Authors: Albert J Yoo; Luis A Verduzco; Pamela W Schaefer; Joshua A Hirsch; James D Rabinov; R Gilberto González Journal: Stroke Date: 2009-04-09 Impact factor: 7.914