Abstract
The adult avian's cerebral arteries of various species have been studied in generally by Hofmann (1900), Kaup (1918), Shiina and Miyata (1932), Kaku (1959), Kito (1962), Baumel 1962, 1967, 1968), Lierse (1963), Vitums (1965) and Richards (1967). However, the studies concerned with the embryonic development of these vesseles were few only reported by Kimura (1918), Hughes (1934) and Romanoff (1960).
Hitherto, the studies have not been done correlated with the development of the brain itself and the arteries of the avian and other species in either adult or embryonic stage. Also little has been studied on the Circulus arteriosus cerebri in the avian, farther more there have been reports that the avians generally do not form the circle comparable to that of mammals and reptiles. In 1975, Gadhoke reported about the turkey's brain arteries, but not in detail. In this paper the morphology of the cerebral arteries of the adult was studied in the 42 chicks and the 21 turkeys. The development of the cerebral arteries was observed in the chick embryos (6-13days) and was compared with the pig embryos (C-R length 15-32mm). Then the form and development of the Circulus arteriosus cerebri was investigated in the chicks, turkeys and chick embryos. As far as this study is concerned, the nomenclature of avian's cerebral arteries is made in correlation with those of the other animals from the view point of the ontogeny and comparative anatomy.
