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
RESUMO
Mercuric chloride [HgC12] is a white cristaline toxic poweder which is absorbed through gasterointentinal tract and skin, and excreted from kidney. Chronic poisoning with mercuric chloride causes sensorial and mobile disorders, behavioral and mental disorders. Mercuric chloride is teratogen for embryonic organs. The aim of the present study was to evaluate the effects of HgC12 on embryo's ventricles and spinal canal as a part of nervous system. In this study 24 female Sprague Dawley rats after scieng vaginal plague that considered at day zero of gestation were divided into four groups: One control group that injected normal saline solution and three experimental groups that injected mercuric chloride 2mg/kg [ip] in 8[th], 9[th] and 10[th] days of gestation. Emboryos were removed from uterus on day 15th and tissue process was done and measured and analyzed with LSD and Duncan tests. Ventricular and spinal cord diameters and coroidal branches in experimental groups were decreased significantly compared to control group [p<0.05]. In addition the spinal canal diameter in control group was significantly [p<0.001] more than experimental groups. The number of coroidal branches were significantly decreased[p<0.001] in experimental groups compare to control group. The results of this study indicated that HgC12 has toxic effect on nervous system including, decrease in ventricular and spinal cord diameters, and the number of coroidal branches