脳内

noun

intracerebral; intracranial; the inside of the head / (figuratively) the inside of one's mind; within one's mind; mental (of imagined things, etc.)

彼は脳内出血で倒れた。

He collapsed from intracerebral hemorrhage.

意味（1）

intracerebral; intracranial; the inside of the head

意味（2）

(figuratively) the inside of one's mind; within one's mind; mental (of imagined things, etc.)