Discuss two effects of the environment on physiological by hcj

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									Discuss two effects of the
environment on physiological
processes.
Neuroplasticity
        Although localization of
          function does occur…
        • The specific location of
          that function is not
          fixed for all individuals.
        • It can change according
          to environmental
          demands
Rosenzweig and Bennett (1972)
Rosenzweig and Bennett (1972)
               Findings
               • Rats in the stimulating
                  environment had an
                  increased thickness in the
                  cortex.
               • The frontal lobe (thinking,
                  planning g, decision making)
                  was heavier in the rats that
                  had been in the stimulating
                  environment.
               • Having toys created the
                  best conditions for
                  developing cerebral
                  thickness.
Rosenzweig and Bennett (1972)
               Issues
               • These findings can be
                  generalized to human
                  only to some extent.
               • it is difficult to decide
                  what is considered to
                  be an
                  enriched environmental
                  for a specific person.
               • Rats were sacrificed?
Maguire et al. (2000)
           • Aim: To investigate
             whether or not the
             hippocampus plays a
             role in human spatial
             memory
Maguire et al. (2000)
           Method:
           • London taxi drivers with a range
             of age and experience were the
             participants because their work
             requires the extensive use of
             spatial navigational skills
           • Matched pairs design:
             participants were age and gender
             matched with a control group
           • Two different types of MRI
             scanning were used to assess
             how the brains of the taxi drivers
             differed from the control group
           • Quasi experiment
Maguire et al. (2000)
           • showed significantly
             more grey matter in
             both left and right
             hippocampi of the taxi
             drivers compared to the
             control group
Maguire et al. (2000)
           Evaluation:
           • No researcher bias
           • No ethical implications
           • Only observed males
           • Only observed 16 matched
             pairs
           • Nature vs. Nurture debate:
             did the driving influence the
             change in the hippocampus,
             or did their larger than
             average hippocampus lead
             them to become taxi
             drivers?

								
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