Table4
  • Comparison of mPFC and NAc neuronal responses to cocaine and heroin self-administration in separate sessions in which cocaine and heroin were self-administered first (same format as in Table 2). A, Data obtained from the mPFC; similar to the results obtained from cocaine and heroin self-administration in the same session (Tables 2, 3) the majority of neuron-response cases with a significant response responded to cocaine and heroin self-administration differently (80.5%); only 19.5% of neuron-response cases shared the same response to cocaine and heroin. B, Data obtained from NAc; only 20.4% of neuron-response cases responded in the same way to cocaine and heroin whereas 79.6% of neuron response cases responded differently to cocaine and heroin self-administration.