The elevated plus maze (Med Associates) comes in two versions: with and without Near Infrared (NIR) backlight. Infrared backlight has the advantage of being invisible to the animals along with providing superior contrast for highly accurate tracking with EthoVision®XT. The mazes are constructed of black polypropylene walls. The NIR backlit maze has an acrylic diffuser panel for runway surfaces, and a camera bracket made of extruded aluminum.
New automatic guillotine doors (optional) can be controlled with EthoVision XT’s Trial & Hardware Control Module. The quiet motor of each door is mounted underneath the runway arm to provide a clear view of the animal throughout the entire maze. To connect the doors to your computer, use a Noldus (mini) USB-IO box and a TTL to 28 Volt converter.