The Morris water maze (MWM) is a behavioral test used to assess spatial learning and memory in small animals such as rats and mice. The maze consists of a large circular pool filled with water, with a hidden adjustable platform placed at a fixed location beneath the surface. The pool is usually made of blue, black, or white plastic, and the water is made opaque with the addition of a white powder or paint. The animal is placed in the pool and is required to find the hidden platform in order to escape the water.

During the test, the animal’s movements are tracked, and different measures such as the time taken to find the platform, the distance travelled, and the swimming path can be used to assess its spatial learning and memory abilities. The test is typically conducted over a period of several days, with the animal’s performance improving over time as it learns the location of the platform.