Browder J, Kaplan H A, Krieger A J
Surg Neurol. 1975 Jul;4(1):53-5.
At birth, 25% of infants have relatively large venous channels coursing in the mid-line of the suboccipital dura mater. They connect the confluence of sinuses with the marginal sinuses. These are limited to the midline suboccipital dura mater in some, whereas in others they implicate the contiguous falx cerebelli as well. These fetal channels gradually shrink, dwindle, or otherwise disappear, and are absent in adolescents and adults. When performing a bilateral suboccipital craniectomy on an infant, one usually divides these venous channels. This may present technical difficulties. Vinylite casts have been made of a series of occipital sinuses. These demonstrated the size, variations, course, and connections of the occipital sinuses and these venous pathways.
出生时，25%的婴儿在枕下硬脑膜中线处有相对较大的静脉通道。它们将窦汇与边缘窦相连。这些通道在一些婴儿中仅限于枕下硬脑膜中线，而在另一些婴儿中则累及相邻的小脑镰。这些胎儿期的通道会逐渐缩小、变细或消失，在青少年和成年人中不存在。在对婴儿进行双侧枕下颅骨切除术时，通常会切断这些静脉通道。这可能会带来技术难题。已制作了一系列枕窦的乙烯基树脂铸型。这些铸型展示了枕窦以及这些静脉通路的大小、变异、走行和连接情况。
