Effects of memory strength on the stability of reactivated memories. A–C, Experimental design used with data presented below. Mice were trained with three footshocks. A, Effects of 3 min reexposure on freezing during test (saline, n = 10; ANI, n = 11). B, Effects of 5 min reexposure on freezing during test (saline, n = 10; ANI, n = 10). C, Effects of 10 min reexposure on freezing during test (saline, n = 10; ANI, n = 11).