…In the brain, these two membranes are mostly fused together, but in a small area they are separated into an inner and outer membrane, which contains venous sinuses and nerve trunks. The second membrane is called the arachnoid membrane (arachnoidea), and the third or innermost membrane is called the pia mater (pia mater). Both are thin membranes connected to each other by numerous bundles of connective tissue, and together they are called the leptomeninx. … *Some of the terminology explanations that mention "arachnoidea" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…脳ではこの2枚が大部分の場所で融合しているが,わずかのところで内外の2枚に分かれてその間に静脈洞があったり,神経の幹が含まれたりする。第2の膜をくも膜arachnoideaといい,第3すなわち最も内側の膜を柔膜pia materという。この二つはいずれも薄い膜で,両者は多数の結合組織束によって相連なっており,合わせて軟膜leptomeninxと呼ばれる。… ※「arachnoidea」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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