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The drugs they studied included cocaine and a few others that have some similarities to cocaine in how they affect the brain. They trained the monkeys to give themselves these drugs through injections and observed their behavior. They wanted to see if the drugs had similar effects on the monkeys.
Cocaine is a non-selective, competitive inhibitor of monoamine transporters, sharing a similar mechanism with that of methylphenidate. Cocaine interacts with DAT, SERT, and NET, although the behavioral and reinforcing effects of cocaine depend on its inhibition of DAT and the increase in extracellular dopamine. [1]
This suggests a positive neuromodulatory action of CART on the effects of psychostimulants in rats. [18] CART is altered in the ventral tegmental area of cocaine overdose victims, and a mutation in the CART gene is associated with alcoholism. [19] By inhibiting the rewarding effects of cocaine, CART has a potential use in treating cocaine ...
The test can detect antipsychotic-like activity both in the case of dopamine D 2 receptor antagonists and in the case of drugs lacking D 2 receptor antagonism. [1] [2] [6] The occupancy of the D 2 receptor by antagonists of this receptor required to inhibit the CAR is around 65 to 80%, which is similar to the occupancy at which therapeutic antipsychotic effects occur in humans with these drugs.
Cocaine's mechanism of action in the human brain includes the inhibition of dopamine reuptake, [49] which accounts for cocaine's addictive properties, as dopamine is the critical neurotransmitter for reward. However, cocaine is more active in the dopaminergic neurons of the ventral tegmental area than the substantia nigra.
An EEG is a noninvasive test that measures electrical activity in the brain using small metal discs called electrodes, which are attached to the scalp. These tests provide “quick and accurate ...
[16] [19] [44] [38] [46] In accordance with the preceding, levomethamphetamine was found to selectively induce brain norepinephrine release with minimal effect on brain dopamine release across an assessed dosage range in rodents. [48] The drug did not increase locomotor activity at the assessed doses, in which brain dopamine release was not ...
Exposure to psychoactive drugs can cause changes to the brain that counteract or augment some of their effects; these changes may be beneficial or harmful. However, there is a significant amount of evidence that the relapse rate of mental disorders negatively corresponds with the length of properly followed treatment regimens (that is, relapse ...