BHS 49907 Memory and Amnesia - PowerPoint PPT Presentation

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BHS 49907 Memory and Amnesia

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McConnell (1962) cut up planaria (flatworms) and fed them to other worms who ... McConnell thought memories were encoded in the RNA, not just the neurons. ... – PowerPoint PPT presentation

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Title: BHS 49907 Memory and Amnesia


1
BHS 499-07 Memory and Amnesia
  • Neuroscience of Memory

2
Neurons
  • Memory consists of a change in the structure of
    neurons that leads to increased likelihood of
    firing.
  • Review of neural structure
  • CD 2.1 first slide, 2.2 action potential
  • Long-term Potentiation (LTP) both short and
    long-term changes in the brain
  • CD 13.2 13.3 (consolidation)

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A Blind Alley
  • McConnell (1962) cut up planaria (flatworms)
    and fed them to other worms who showed the same
    learning.
  • McConnell thought memories were encoded in the
    RNA, not just the neurons.
  • By eating the RNA, the attributes were passed on
    to another being (or person).
  • His results were not replicated (not true).

7
Larger Structures
  • Semantic memory is structured based on shared
    meaning, not prior associations.
  • Similar concepts in terms of meaning are stored
    closer to each other.
  • Semantic closeness is metaphoric, based on
    response times.
  • Activation spreads to related items.
  • A great deal of repeated use moves items from
    episodic to semantic memory.

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Influences on Memory
  • Alcohol Bits Pieces
  • Stress -- Kolb Whishaw Seg 32 (CD 2)
  • Diabetes Kolb Whishaw Ch 13 Seg 6 (CD 3)

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