Lateralisation/split brain

Cards (4)

  • Lateralisation-
    • functions can be localised to one hemisphere, which are specific to functions.
    • Left- language (Broca and Wernickes areas)
    • Right- visual and spatial
  • Lateralisation-
    S- Fink (1996)- Pet scan while completing visual tasks, showed that the right hemisphere was active for a large picker, and left on part of the picture.
    W- There is never a dominant brain side- Nielsen (2013) 1000 participants aged 7-29, supported lateralisation, but there was no proof of a dominant side.
  • Split brain-
    Sperry – 1968
    • Showed 11 split brains an image to the right eye, to then be sent to the left side, and opposite
    • A normal brain would have the infor shared between both sides, but due to them being split this isn’t possible
    • Found that with the RE/LS there could be a description of what was seen, but this was impossible for the LE/RS.
    • LE could still pick a similar object, bit just not speak about it or what it was.
    • Shows how certain functions are lateralised to the brain and supporting that the left hemisphere handles language and the right for visual/spatial
  • Split brain-
    S- Gazzaniga (1989) showed that split brain people were better at certain tasks, like being faster at identifying the odd one out in objects- left is watered down by the right (Kingstone 1995)
    S- Ethics- Split Bain procedure was done before the experiment, and the task had all the participant's full consent
    S- Confounding variable due to the control being neurotypical, and not having epilepsy, meaning the results could be due to the lack of epilepsy not from a full brain.