Valvula cerebelli (English spelling) Valvula cerebelli

…the protocerebellum is involved in the organs of balance and the lateral line organ, and is well developed in fish such as sharks that are sensitive to vibrations (sound, electricity), while the accessory flocculus is formed in flying birds. In bony fishes, part of the cerebellum projects into the midbrain ventricular cavity to form the cerebellar valve (valvula cerebelli), but in the African freshwater fish Mormyrus , which has a well-developed lateral line organ, it is very large. In birds and reptiles, distinct cerebellar nuclei are formed deep in the cerebellum, as in mammals. …

*Some of the terminology that mentions "valvula cerebelli" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…原小脳は平衡感覚器と側線器官にかかわり，波動(音，電気)に敏感なサメのような魚類ではよく発達し，飛行する鳥類では副片葉が形成される。硬骨魚類では小脳の一部が中脳脳室腔に突出して小脳弁valvula cerebelliをつくるが，側線器官の発達したアフリカの淡水魚モルミルスMormyrusではひじょうに大きい。鳥類や爬虫類では小脳の深部において，哺乳類のように明りょうな小脳核が形成される。…

※「valvula cerebelli」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