Biological Assumption

  • Created by: Mbegum
  • Created on: 28-12-18 17:23
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  • Biological Assumptions
    • Evolutionary Influences
      • Theory of Evolution
        • Mind + behav change
          • to adapt to demands of indiv enviro
      • Theory of Natural Selection
      • Environment of Evolutionary Adaptiveness
        • the enviro that any species is adapted to + the selective pressures of the time
          • not all behav is adaptive
            • behav only adaptive if increases survival in enviro
              • E.g large brain:body ratio = brain evolved in response to complex social organisations
    • Localisation of brain function
      • Principle = certain areas of brain responsible for different functions
        • E.g cerebral cortex = covers all around brain + responsible for higher order cognitive function
      • The Four lobes
        • Frontal lobe
          • involved in thinking & creativity
            • linked w/ our personalities
        • Parietal lobe
          • Receives sensory info
            • e.g temp + pressure
        • Temporal lobe
          • Responsible for most of memory processing + auditory info
        • Occipital lobe
          • concerned w/ visual processing
            • receives info from eyes
      • Localisation of Language
        • Broca's Area
          • associated w/ speech production
            • posterior frontal lobe
        • Wernicke's Area
          • associated w/ understanding lang
            • posterior left temporal lobe
    • Neurotransmitters
      • Mental Health
        • Serotonin
          • role in sleep + mood + appetite
          • low levels
        • Dopamine
          • high levels
            • associated w/ scz symptoms
              • evidence = dopamine blocking drugs = reduce scz symptoms
      • Neurons
        • Electrically excitable cells
        • Communicate = at synapse
          • message via chemical messengers AKA NT's
            • NT's released from presynaptic vesicle
              • Inhibit/stimulate receptors at postsynaptic receptor

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