“Microiontophoretic administration of cocaine caused only a weak (15–20%) inhibition of the activity of A10 DA neurons, but significantly increased and prolonged the inhibition produced by iontophoretic DA.”
“Therefore, it is hypothesized that the relatively weak inhibitory effects of cocaine on A10 DA neurons may represent a poor compensatory response to enhanced DA neurotransmission within the NAc, and may help to explain the extremely potent rewarding effects of this important drug of abuse.”
“These results suggest that the effects of cocaine on A10 DA neurons are due to inhibition of DA reuptake, a conclusion that has been supported by several other findings.”