RESUMO
Many arteries are responsible for nutrition of brain tissue that one of them is themiddle cerebral artery with its branches [perforating arteries]. The collapse or injury in each ofthese branches lead to brain stroke or pathologic injury in brain so perforating arteries has anatomicimportance and also it is necessary to recognize these arteries therefore we decided to measurelength, outer diameter and number of these vessels in middle cerebral artery.In this descriptive study 26 Brains [21 male and 5 female] of people whowere dead by non brain problems causes were surveyed using usual dissection method. The brainswere taken out in Kerman forensic medical center and dissection of the brains wereperformed inDepartment of anatomy, Kerman faculty of medicine.The length, diameter and number of perforations were measured in middle cerebral artery [MCA].Data were analysed by t-test.Results showed that the main number of perforating artery branches was 6.03 in right and6.57 in left the differences between two parts were not significant. The mean length was 13.61 +/- 0.05in right and 13.72 +/- 0.51 in left that were not significantly different. The mean outer diameter was0.49 +/- 0.01 in right and 0.58 +/- 0.03 in left the difference was significant [p<0.05].This study showedthat the outer diameter of perforating arteries in MCA weresignificantly differentein right and left brain, but the other variables were not significantly differentin right and left brain