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2010.04.22 - NCM: Day 2

  • Gary Paige - Spatial localization
    • Vision - visual reference frame
    • Audition - head reference frame
    • What about visual/hand reference frame?
    • Auditory spatial localization is aligned to gaze
  • Gdowski - Postural reflexes - reweighting due to changes in inertia (head rotation)
    • Reflexes adapt to changes in inertia to maintain kinematics
  • Paul DiZio - Development of context specific adaptation to limb and object dynamics in human arm kinematics
    • Coriolis vs robot curl - give self vs environment context
    • No context change for kids under six years old
    • Context appears to be based on experience
  • Lackner - Rotating rooms
    • Arguing for large feedforward component
    • Likely large mismatch between golg tendon organ and muscle spindle feedback during coriolis forces
  • Dan Marigold - Visual input regarding the environment critical for movement
    • Variability decreases right before obstacle
      • You need to get the body into a functional configuration, right?
      • How about bowling, long jump, diving board?
    • Gaze fixation occurs before reaching obstacle
      • Look two steps ahead
    • Did not readjust gaze
      • What about delay?
    • Plane of head for two steps ahead does it correspond to keeping head in position for semicircular canals to be level?
  • Trevor Drew - Posterior parietal cortex in controlling precise walking in cats
    • Planning
      • Posterior parietal cortex, premotor cortex, basal ganglia, lateral cerebellum
      • Lesion causes cats to hit the obstacle
      • Process visual information to adjust gains necessary for paw placement
  • Keir Pearson - Memory in motor movements
    • Cats remember obstacles
    • Parietal lesion destroys long lasting memory
    • OBstacle is represented relative to the cat's body
  • Amy Bastian - Learning and context
    • Visual context makes a difference (more transfer w/ eyes closed)
    • Timing and spatial adaptation appear to occur at different rates
    • Seems that adaptation occurs mostly with the spatial characteristics.
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