Disk-over-water method
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The disk-over-water method is a technique for causing sleep deprivation in laboratory animals.
The subject—for example, a rat[1] or pigeon[2]—is placed on a disk. When the subject shows signs of falling asleep, the disk begins to slowly rotate, at a few revolutions per minute. The subject must walk to keep pace with the disk, or it will be carried into a pool of water.[3]
