6 ms·I wonder if this modifications increased the brain volume, and if this was a motivation.by silveira 11y agoI wonder if this modifications increased the brain volume, and if this was a motivation.Kliment 11y agoWikipedia says it had no effect on cranial volume, for what that's worth.silveira 11y agoI think I read the same article (not totally conclusive though). Their perception of a positive influence could have lead to this behavior (modifying skulls).