The Barnes maze is a popular test for assessing spatial learning and memory in rats. The test involves making the surface of the maze aversive using bright illumination. The rat is given the opportunity to escape the maze surface by crawling through the correct hole, under which is located a "safe box". This unit features a total of 18 holes, one escape box and 6 possible locations to place the slide in box.

The base of this unit now consists of two pieces of crossed 0.5" (12.7mm) HDPE measuring 36 in Long x 24 in High (91.4 x 61 cm). The pedestal base shown in the photo has been replaced with a different style. The amount of time required for the rat to locate the safe box may be measured with a video tracking system or measured by the researcher.

• Maze Diameter: 48" (122 cm)
• Maze Height: 24" (60.96 cm)
• Number of Holes: 18
• Hole Diameter: 4" (10 cm)
• Number of Goal Boxes: 1
• Number of Goal Locations: 6