Results

• Visual and verbal task, display ($) signs to LVF and (?) to RVF:

  • Participant reports he saw the ? sign (shows RVF linked to LH where the language centres reside)
  • Participant can draw $ sign with left hand (shows LVF is linked to left hand and both linked to RH)
• 2. Visual material shown to left visual field only:

  • Shown to LVF only. Participant reports he saw nothing or saw a flat of light on left.
  • Picture of a pretty woman (a 'pinup') to LVF. Participant giggles but says he saw nothing. shows emotional response from RH.
• 2. Visual material shown to RVF only: Participant can describe visual material in speech and writing as normal (RVF linked to LH and right hand)
• 3. Visual and tactile task:

  • If an object is placed in the left hand participants can only make will guesses and may seem unaware that they are holding anything.
• 4. Dual processing tactile task:

  • Participant's right (or left) hand selects object presented to it, but each hand ignores the other hand's objects.
• 5. Everyday life:

  • Participants continue to watch TV or read books with no complaints; intellect and personality are unchanged. However, they have short-term memory deficits and difficulties with concentration.
• CONCLUSION: Functions are lateralised in the brain.

  • The right hemisphere is 'silent' as it cannot respond verbally. It can respond with some emotion (ie giggling)
  • In a sense we all have two minds in one body.