You're looking at Less Wrong's discussion board. This includes all posts, including those that haven't been promoted to the front page yet. For more information, see About Less Wrong.

hyporational comments on Open thread, Dec. 22 - Dec. 28, 2014 - Less Wrong Discussion

5 Post author: Gondolinian 22 December 2014 02:34AM

You are viewing a comment permalink. View the original post to see all comments and the full post content.

Comments (218)

You are viewing a single comment's thread. Show more comments above.

Comment author: hyporational 23 December 2014 04:16:35PM *  4 points [-]

The hippocampus is a relatively tiny structure in the human brain, and I would guess it's even proportionally smaller in the mouse brain. I doubt the corresponding decrease in cerebrospinal fluid volume would make any difference in function. There's already much more variation in cerebrospinal fluid volume in healthy humans than a 20% increase in hippocampal volume could account for.