Objective: Over the last two decades the subject of neurotransmitters in cognitive functions has drawn a lot of attention.
Method: This article reviews the role of histamine, opioids, adenosine, cholecystokinin, nitric oxide, and glutamate in cognitive behaviors.
Results: Numerous animal studies have been carried out so far, on the role of neurotransmitters on learning and memory.
Conclusion: The increase or decrease in neurotransmitters' levels, and activation or blockage of their receptors has shown to affect the learning and memory. It is postulated that a network of different neurotransmitter systems can influence learning and memory processing.
Subject:
Special Received: 2003/08/23 | Accepted: 2003/10/23 | Published: 2003/12/22