The chambers were constructed from aluminum (sidewalls and ceiling) and Plexiglas (rear and front walls). They were placed individually in sound-attenuated cabinets with black inside walls (interior dimensions: 43.3L × 55.3W × 58.5H cm; Coulbourn Instruments.), which were located in a ...
In addition, EH animals had access to a second, so-called stimulus cage during the dark phase that was connected to the home cage by a Plexiglas tunnel. The stimulus cage contained different stimulus objects divided in five categories: 1) permanently, a sisal rope and gnawing wood were ...