大脳 だいのう縦裂 じゅうれつじゃなかったです
dainōjū retsujanakattadesu

Noun
Desu Copula

The polite, past negative form of 大脳縦裂

1. Wasn't the brain fissure.; Wasn't the longitudinal fissure.

Past/Perfective
Negative
Polite
Casual Register