Türk Nöroşirürji Dergisi 1996 , Vol 6 , Num 1
THE INVESTIGATION OF CIRCLE OF WILLIS' SEGMENT MEASUREMENTS IN HUMAN FOETUSES
Mustafa BÜYÜKMUMCU1, Taner ZİYLAN1, Ahmet SALBACAK2, Uğur ERONGUN1, A. Kağan KARABULUT1
1Selçuk Üniversitesi Tıp Fakültesi Anatomi ve Nöroşirürji Anabilim Dalı, Konya
2Süleyman Demirel Üniversitesi Tıp Fakültesi Anatomi Anabilim Dalı, Isparta
Circulus Arteriosus Cerebri (Circle of Willis) was first described in 1664 by Thomas Willis. The first model of this network, resembling to that of adults and has a biological function to save the brain from ischemia, is realized in fetus at the second month of pregnancy. In this study, we have aimed to investigate diameters and lenghts of the circle vessells in 20-month-old aborted fetuses. For this purpose, all segments of each circle were infused with latex and then photographed. The diameters of 19 and the lenghts of 8 segments of each circle were measured. All of the circles examined were complete type.

Mean lenght and diameters of all segments in the circle were calculated.

In the fetuses with CRL values between 16-21cm, lowest and highest values of the segments in the circle were determined. Anahtar Kelimeler : Fetuses, Circle of Willis