Lesions of the dorsomedial amygdala, but not the nucleus accumbens, reduce the aversiveness of morphine withdrawal in rats (Kelsey 1994)
- A 20 x 49 x 31-cm galvanized steel shuttle box.
- The shuttle box was divided into two 20.0 x 24.3-cm interconnecting chambers by a metal partition which had a 7 x 8-cm arch flush with the floor.
- One chamber was silver gray, had a steel mesh screen with 1 x 1-cm openings covering the grid floor.
- The other chamber was painted black, had a grid floor of stainless steel grids 0.6 cm in diameter separated by 2 cm center to center running across the width of the chamber.