The development of a conditioned place preference to morphine: effects of lesions of various CNS sites (Olmstead 1997)



  • The three compartment CPP apparatus was made of Acrylic.
  • Two of the compartments were identical in size (45 X 45 X 30 cm)
  • One had White walls with smooth floor.
  • The other had black walls and wire mesh floor.
  • The third compartment was an unpainted tunnel (36 X 18 X 20 cm).

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