Departament of Morphological Sciences, Post Graduate Program in Neuroscience, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul - UFRGS, Porto Alegre, RS, Brazil.
Departament of Morphological Sciences, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul - UFRGS, Porto Alegre, RS, Brazil.
Anat Rec (Hoboken). 2019 Jul;302(7):1187-1194. doi: 10.1002/ar.24015. Epub 2018 Dec 13.
Thirty ostrich specimens were injected with red-dyed latex via the internal carotid arteries (Aa.) The middle cerebral and cerebroethmoidal arteries and their branches were systematized. The middle cerebral artery (a.) was always a single large vessel. On the right side, it had two, three, or one developed medial hemispheric branches in 46.6%, 26.7%, and 26.7% of cases, respectively. On the left side, one (36.7%), two (33.3%), and three (30%) developed medial hemispheric branches were observed. The middle cerebral artery had eight (40%), nine (20%), seven (16.7%), eleven (6.7%) ten (6.7%), twelve (3.3%), six (3.3%), and five (3.3%) developed lateral hemispheric branches on the right side and seven (46.7%), nine (13.3%), eight (13.3%), six (10%), five (10%), and ten (6.7%) on the left. Two (33.3%), four (20%), three (20%), one (16.7%), and five (10%) direct perforating branches of the middle cerebral artery were present on the right, and three (33.3%), two (30%), one (13.4%), six (10%), four (10%), and five (3.3%) were present on the left. The cerebroethmoidal artery, always present as a natural continuation of the rostral terminal branch of the brain's carotid artery and originating from the middle cerebral artery, was a large vessel that projected rostromedially, giving off the rostral cerebral artery shortly after its formation and continuing as the ethmoidal artery. The rostral cerebral artery was a single (90%) and double (10%) vessel on the right and a single (96.7%) and double vessel (3.3%) on the left. The ethmoidal artery was always a medium to large single vessel and was the natural continuation of the cerebroethmoidal artery, immediately after giving off the rostral cerebral artery. Anat Rec, 302:1187-1194, 2019. © 2018 Wiley Periodicals, Inc.
三十只鸵鸟标本通过颈内动脉（Aa.）注入红色乳胶。大脑中动脉和筛前动脉及其分支被系统化。大脑中动脉（a.）始终是单一的大血管。在右侧，分别有 46.6%、26.7%和 26.7%的情况下有两个、三个或一个发育良好的大脑半球分支。在左侧，观察到一个（36.7%）、两个（33.3%）和三个（30%）发育良好的大脑半球分支。大脑中动脉有八个（40%）、九个（20%）、七个（16.7%）、十一个（6.7%）、十个（6.7%）、十二个（3.3%）、六个（3.3%）和五个（3.3%）在右侧发育良好的外侧半球分支，而在左侧有七个（46.7%）、九个（13.3%）、八个（13.3%）、六个（10%）、五个（10%）和十个（6.7%）。右侧有两个（33.3%）、四个（20%）、三个（20%）、一个（16.7%）和五个（10%）大脑中动脉的直接穿透分支，而左侧有三个（33.3%）、两个（30%）、一个（13.4%）、六个（10%）、四个（10%）和五个（3.3%）。筛前动脉总是作为大脑颈动脉的额端分支的自然延续，并起源于大脑中动脉，是一个向头内侧投射的大血管，在形成后不久发出额前动脉，并继续作为筛前动脉。额前动脉在右侧是单一（90%）和双（10%）血管，在左侧是单一（96.7%）和双血管（3.3%）。筛前动脉总是中等至大的单一血管，是筛前动脉的自然延续，在发出额前动脉后立即。解剖学记录，302:1187-1194，2019。© 2018 威利父子公司
