Localisation of function AO1

  • Created by: Jordan64
  • Created on: 23-08-17 17:15
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  • Localisation of Function
    • Holistic theory replaced by localisation in recent years
      • 19th Century: Holistic - all parts of brain involved in processing thought and action
      • Specific areas of brain later linked with physical and psychological functions
      • If an area of brain damaged - function associated with area also affected
    • Brain divided into two hemispheres and lateralised
      • Brain two halves: left and right hemisphere
      • Lateralisation: some physical and psychological functions controlled by particular hemisphere
      • Left side controlled by right hemisphere, vice versa
    • Outer layer: Cerebral cortex
      • covers inner part of brain, 3mm thick, developed
      • Grey matter = location of cell bodies
    • Divided into 4 lobes: frontal, parietal, occipital & temporal
      • Motor: back of frontal lobe, controls voluntary movement
        • Damage = loss in fine motor movements
      • Stomatosensory area: front of parietal lobe, processes sensory info from skin
        • amount of stomatosensory area to body part denotes sensitivity
      • Visual area: occipital lobe at back of brain, each eye sends info from right visual field to left visual cortex, vice versa
        • Damage to left hemisphere = blindness to right visual field, vice versa
      • Auditory area: in temporal lobe, analyses speech-based info
        • Damage = partial hearing loss
    • Broca's area: speech production
      • Left frontal lobe, Damage = Broca's aphasia
        • Slow, laborous speech, difficulty finding & naming objects, difficulty with prepositions and conjunctions
    • Wernicke's area: language comprehension
      • back of temporal lobe, damage = Wernicke's aphasia
        • Fluent but meaningless speech - neologisms

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