Figure 5.
(A) Effect of the cannabinoid antagonist SR 141716A administered i.v. at arrows on an antidromically identified VTA-accumbens DA neuron recorded from a rat belonging to the S-W group. Recording was performed 24 h after last Δ9-THC administration. (B) The figure shows the failure of i.v. SR 141716A, administered at arrows, in altering the spontaneous neuronal activity of an antidromically identified VTA-accumbens DA neuron recorded from a rat belonging to the Control group. Recording was performed 24 h after last vehicle administration. Numbers above arrows indicate dosage expressed in mg/kg.