Reticular formation

Japanese: reticular formation(英語表記)reticularformation
Reticular formation

…It is sometimes simply called the reticular formation. It is a series of structures that exist from the top to the bottom of the brainstem tegmentum, and is made up of a complex network of nerve fibers running like a mesh and groups of nerve cells scattered among them. It is phylogenetically ancient and is a basic structure found in almost all vertebrates. The reticular formation is said to exist widely from the spinal cord to the diencephalon, but the reticular formations of the medulla oblongata, pons, and midbrain are usually collectively referred to as the brainstem reticular formation. In the past, their connections and functions were not well understood, so they were generally treated as the brainstem reticular formation. …

*Some terminology explanations that mention "reticular formation" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…単に網様体reticular formationということもある。脳幹被蓋の上方から下方にかけて存在する一連の構造で,網目状に複雑に走る神経繊維網と,その間に散在する神経細胞の集団からできている。系統発生的に古く,ほとんどすべての脊椎動物にみられる基本的な構造である。網様体は広く脊髄から間脳にまで存在するとされているが,通常は延髄,橋(きよう),中脳の網様体を脳幹網様体と総称している。かつては,その結合や機能がよくわからなかったため,脳幹網様体として総括的に取り扱われてきた。…

※「reticular formation」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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