The Y maze is similar to the T maze, except with three arms at 120 degrees to each other. The rodent or mouse starts at the end of one arm, then chooses between the other two. Spontaneous alternation is measured to demonstrate learning.
The Y-maze is often preferred to the T-maze because gradual turns decrease learning time as compared to the sharp turns of the T-maze. It is also a smaller maze* to allow fewer degrees of freedom of movement, focusing the animal on the task at hand. The Y Maze can also be baited with food for rewarded alternation. Food wells are standard 1cm deep.
The elevated plus maze test is one of the most widely used tests for measuring anxiety-like behavior. The test is based on the natural aversion of mice for open and elevated areas, as well as on their natural spontaneous exploratory behavior in novel environments. This test has a strong validity profile for anxiolytic drug validation and screening. All open arms include 1cm high end plates to ensure the mice do not fall off the maze during exploration.