AO1

• Define Hemispheric lateralisation

  -two hemispheres of the brain are specialised for different functions.
• Is language in the left or right hemisphere

  -left (Broca's area speech production wernickes for comprehension)
• What occurs in the right hemisphere

  -spatial abilities and emotional processing
• mathematical and logical reasoning occurs where?

  -left hemisphere
• LANE for left

  L-language(speech writing grammar)

  A-Analytical thinking (maths reasoning logic)

  N-numbers(calculations problem-solving)

  E-explicit processing (detail oriented structured)
• RAIN for right

  R-Rhythm(music beat timing)

  A-Artistic (creativity imagination)

  I-intuition(gut feelings emotional tone)

  N-Non verbal cues (facial recognition spatial awareness)
• How has split brain research provided evidence for hemispheric lateralisation

  -study of patients who have had their corpus callosum severed, usually as a treatment for severe epilepsy.

  -This procedure prevents communication between the two hemispheres.
• Outline Sperry's procedure

  -He presented information to either the left or right visual field of split-brain patients.

  -Because visual information from each field is processed in the opposite hemisphere, this allowed Sperry to investigate the roles of each side independently.
• When info was presented to the left visual field (processed by the right hemisphere),

  -patients could not verbally report what they had seen, because language production is localised in the left hemisphere
• However they could select

  -the object using their left hand, showing that the right hemisphere could still process the information non-verbally
• In contrast, when information was presented to the right visual field (left hemisphere),

  -patients could easily describe what they had seen. These findings demonstrated clear hemispheric lateralisation of function.