Synapses and neurotransmitters

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  • Created by: 11pyoung
  • Created on: 14-04-17 11:41
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  • Synapses and Neurtransmitters
    • Synapses
      • Parts of the Synapse
        • Vesicle
        • Neurotransmitters
        • Re-uptake port
        • receptors
        • Post-synaptic membrane
        • Synaptic knob
      • Types of Synapse
        • Excitatory
          • Makes something happen
          • Form action potential in the second nerve
        • Inhibitory
          • Stops something happening
          • Switch off second nerve
    • Neurotransmitters
      • Excitatory
        • Dopamine
          • Brain
        • Serotonin
          • Brain
        • Acetylcoline
          • Peripheral nervous system
            • Spinal cord to muscles
      • Inhibitory
        • GABA
          • Brain
      • Evaluation
        • Strengths
          • PET scanning by Jovanovic
            • Investigated serotonin in women
              • Low levels associated with depression more in women
              • Found differences in the synaptice receptors related to serotonin of women with premenstrual dysphoric disorder (PMDD)
                • Suggests the role of serotonin in the disorder
                  • Shows the role of neurotransmitters in affecting people's emotions and behaviour
                • Shows the role of neurotransmitters in affecting people's emotions and behaviour
          • Human brain scans are a positive as humans, not animals are tested
            • It has scientific credibility as more than one person can check the result, leading to high reliability
        • Weaknesses
          • Allen and Stevens
            • Found less than half  the neurotransmitters in synapses in the hippocampus arrived from the presynaptic membrane
              • Shows synaptic transmission is not straightforward and may not be involved in behaviour as first thought
          • Most evidence comes from animal lesion studies
            • Leads to generalisability issues as generalising from animals to humans might not be credible and may lack population validity

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