Researchers record no brain activity when a baby rat vigorously moves its left hindlimb while awake.
(Photo Credit: Video courtesy of Mark Blumberg)
While the left hindlimb of a sleeping baby rat twitches, researchers record the extensive activity in the area of the rat's brain that is sensitive to twitches of that limb.
(Photo Credit: Videos courtesy of Mark Blumberg.)
Source: University of Iowa