Neurotransmitters Essay

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Martinez and Kesner (1991) Case study on the role of neurotransmitters in learning and memory Aim: The researchers carried out this experiment with the aim of determining the role of neurotransmitter acetylcholine on memory. They used case study in order to figure out their prediction. "Acetylcholine is the primary neurotransmitter involved with thought, learning, and memory. It sharpens our concentration and perception. For its manufacture, we need choline, a component of lecithin, known popularly as a "nerve food." A lack of choline can produce a decrease in memory. Drugs and medications can interfere with the manufacture and effectiveness of acetylcholine. It is thought that Alzheimer's disease, which is characterized by severe disturbances in brain function, may be linked to a lack of acetylcholine."[1] Participants: The participants were rats. They were chosen through random sampling. All of them had probably the same age. After that they were trained to go through a maze, where they received food at the end. Once the rats had been trained to do this they were broken into three groups; of equal amount of rats. *The amount of rats used for the case study isn’t mentioned anywhere, probably for ethical reasons. Procedure: After the training and the separation into groups each group got a different treatment. The description of the treatment follows: • Group 1: Rats were injected with a chemical which is called scopolamine which blocked acetylcholine receptor sites (thus decreasing available acetylcholine). "Scopolamine is analkaloid drug obtained from plants. Structurally similar to the nerve substance acetylcholine, scopolamine acts by interfering with the transmission of nerve impulses by acetylcholine in the parasympathetic nervous system and produces symptoms typical of parasympathetic system depression: dilated

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