【摘要】 本文观察了100例成人的下矢状窦,并根据它的有无和在大脑镰游离缘内的起端分为Ⅰ～Ⅳ四型。Ⅱ型,即起于大脑镰游离缘的中1╱3,为最多见,占53%;Ⅰ型和Ⅲ型,分别起于大脑镰游离缘的前1/3和后1/3,依次为33%和13%;Ⅳ型,即缺如型,最少见,只占1%。在下矢窦的末端有17%的标本可见一个静脉池。下矢状窦长度平均为70 mm,直径平均为2.0 mm。窦内未见有蛛网膜颗粒,窦壁内无平滑肌细胞。本文还对下矢状窦的胚胎发生及临床意义进行了讨论。更多还原

【Abstract】 The inferior sagittal sinuses (ISS) in 100 adult cadavers were observed and might be divided into four types according to the following criteria: ISS, taking origin at the intermediate one third in the free margin of the falx cerebri, was defined as Type Ⅱ and was the most common of the four types (53%). Types Ⅰ and Ⅱ, taking origins at the anterior and posterior one third in the free margin of that respectively, were found to be 33% and 13% in turn. Type Ⅳ, namely, with the absence of ISS, was only present in 1% of all cases. The mean length of ISS was 70mm whereas the mean diameter’ 2.0mm. There was no smooth muscle cell in the wall of ISS.更多还原