[The middle cerebral artery system in fetuses: the distribution of the pial branches].

: The aim of our study is to point out the influence of the cerebral development on the evolution of the middle cerebral artery (MCA) system. Brains of 20 fresh fetuses (16-22 weeks) were injected with gelatin-ink China mixture, observed and dissected under surgical microscope in correlation with the evolution of the sylvian fossa. Ending pattern of MCA and territories of distribution of its branches were also discussed.