This Shuttle Cage (14"Wx7"Dx12"H: appropriately sized for mice) is the raw partitioned cage best suited for Active Avoidance but easily converted for Passive Avoidnace or Learned Helplessness paradigms. The included open barrier can be easily removed for cleaning, or to allow for one very large cage area. This cage comes with a pair of photocell sensor bars for side detection, a shock floor and a removable drop pan. The most often used accessories are black-out film, a guillotine door, bright overhead stimulus light, and a set of wall filler panels. Patterned after the modular test cage, this cage comes with full 3-bay modular walls on each end to accept the stimulus-response modules available for all other cages and hubs.