DP 6

• prosopagnosia - face blindness

  • unable to recognise familiar faces, facial differences
  • cannot identify person by name
  • can identify non-facial clues
• characteristics of synaesthesia

  • trigger is required (internal - thought, external - sound)
  • perception is stable over time - always
  • crossover only one direction - one sense influences another, second sense cant influence first one
  • unique
  • experience - vivid, can remember it
• types of synaesthesia

  • grapheme-colour
  • sound-to-colour
  • number-form
  • personification
  • lexical-gustatory
• grapheme-colour - numbers trigger colours
• sound-to-colour - sound triggers coloured shapes
• number-form - numbers automatically visualises map
• personification - ordered sequence perceived as having various personalities
• lexical-gustatory - words (speaking,hearing,writing) trigger tastes
• synaesthesia causes

  • innate
  • genetic
  • childhood learning
  • brains failure to remove excess neurons
  • external factors
• synaesethia is innate - not the same as experience we have when we learn/ remember something
• synaesthesia has genetic basis

  • runs in families four chromosomal
  • four chromosomal regions showed link
• synaethesia result of learning during childhood

  • children learn to associate numbers/ letters with colours to aid memory
• synaesthesia - brains failure to remove excess neurons

  • brain did notefficiently prune excess, weak, unused neuronal connections
  • as adult, they have more neural connections
• synaesthesia result of external factors

  • LSD use
  • brain injuries that leave part of brain without its normal function can cause neighbouring nerve fibres to invade damaged area
  • rewiring cause
• spatial neglect - person tends to ignore the left/ right side of their body/ visual space
• spatial neglect characteristics

  • fail to pay attention to, recognise, respond to stimuli located on one side of their body
• spatial neglect causes

  • damage to one of cerebral hemispheres (right parietal lobe)
  • result of stroke, brain injury
• spatial neglect disrupts everyday life

  • colliding with obstcles on their right/ left
  • eating food from one side of plate
  • ignoring people situated on one side
  • behaving as if one side has ceased to exist
  • dont realise something is wrong