UI study finds twitches during sleep activate the brain in a unique way By: Sara Agnew | 2014.09.29 | 11:23 AM A UI study finds twitches during REM sleep activate the brain in a unique way, providing further evidence that sleep twitches teach newborns about their bodies. ©istockphoto.com/eaniton A University of Iowa study has found twitches made during sleep activate the brains of mammals...