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Split Brain

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Split Brain The findings and implications of split brain research Hemispherectomy This procedure is almost exclusively performed in children because their brains ... – PowerPoint PPT presentation

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Title: Split Brain


1
Split Brain
  • The findings and implications of
  • split brain research

2
Purpose of the Split Brain Procedure
  • Roger Sperry (who won the Nobel prize in 1981)
    and Michael Gazzaniga are two neuroscientists who
    studied patients who had surgery to cut the
    corpus callosum.
  • The intention was to reduce seizures in
    epileptics. (1960s)
  • Surgery first performed on animals to study the
    effects.

3
View Split Brain Video ClipQuestions to Consider
  • What are some of the immediate effects of the
    split brain surgery?
  • Does this surgery reveal anything about the
    dominance or specialization of the hemispheres?

4
Visual Fields
  • What do you notice about the right and left
    visual field?
  • What happens to visual information from both
    fields after it reaches the eye?

5
Split Brain Research
6
Split Brain Research
7
Split Brain Research
8
Split Brain Research
9
Split Brain Research
10
Split Brain Research
11
Split Brain Research
12
Post Split Brain Surgery
  • Eventually split brain patients learn to process
    information in a new manner.
  • Many of the confusing and frustrating effects of
    the surgery tend to decrease.
  • Language Dominant Left Hemisphere

13
Cerebral Hemisphere Dominance
  • Left Hemisphere
  • Right Hemisphere
  • Language
  • Math
  • Logic
  • Spatial abilities
  • Face recognition
  • Visual imagery
  • Music

These are generalizations and in normal people,
the two hemispheres work together, are connected,
and share information through the corpus callosum.
14
Dont be fooled by the spinning lady!!!
  • Spinning Lady Clip

15
Hemispherectomy
  • This procedure is almost exclusively performed in
    children because their brains generally display
    more neuroplasticity, allowing neurons from the
    remaining hemisphere to take over the tasks from
    the lost hemisphere.
  • This likely occurs by strengthening neural
    connections which already exist on the unaffected
    side but which would have otherwise remained
    small in a normally functioning, uninjured brain.

16
Brain Facts
  • Male brains are slightly larger than female
    brains.
  • Plasticity- capacity to re-wire itself. Best
    when young.
  • Adults can generate new brain cells and make new
    connections.
  • Your brain uses about 20 of your bodys energy
    and makes up only 2 of your weight.
  • The Cerebral Cortex has the surface area of a
    pillow case.
  • Has about 100 billion neurons (octopus has 300
    million)

17
How much of our brain do we actually use?
  • All of it!!
  • Which 90 would you like to lose?
  • Brain imaging techniques have debunked the
    alluring 10 Myth
  • Why do you think this is a commonly believed myth?
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