Double blood supply of broca's area of human brain

Objective: to elucidate the double supply of blood to the primary motor speech area (broca's area) and provide the morphometric data of collateral circulation to this area. subject and methods: a total number of 100 cerebral hemispheres were obtained from cadavers and put in 10 percent formalin for one week so as to fix them. a mixture of gelatin and indian ink of various colours was injected in aca,mca and pca separately. measurement of length and diameter of each vessels was made by digital vernier caliper. results: the middle cerebral artery was the major artery supplying this area while the collosomarginal artery appear as collateral artery in significant cases and this double supply to this area could be the cause of better outcome of cerebral infarcts of this area. conclusion: it could explain the better survival rates in cerebral ischemia of this area.