The instrument was purchased from Probecare Scientific  Company.  The Morris water maze task is a very popular test for spatial learning and memory is. The water maze consists of a pool, with a hidden platform submerged just below the water surface. During the Morris water maze test, the rat or mouse learns to escape from the water by locating a hidden platform with the help of visual cues. Optionally, the platform is removed in a second phase of the experiment, or placed in another quadrant, to investigate the animal’s response to this new situation or to measure extinction