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February 22, 2010

  • Seyed
    • Muscle synergies are recruited to modulate task variables
      • NS elicits muscle synergies in response to CoM
      • Number of task variables increases with skill
      • Number of task variables decreases with disuse
  • Hongchul
    • Nervous system perceives task variables
    • Muscle synergies are task dependent
  • Julia
    • Nervous system detects error in the control variable [CoM]
    • Nervous system adapts feedback gains when error is detected
  • Jeff
    • CoM is a task variable
      • Delayed neural feedback from CoM will produce CoM trajectories that are more physiologically similar than delayed neural feedback from hip angles.
    • Configuration alters neural control
      • Configuration alters task variable estimation
      • Configuration alters effect of neural control output
        • Changes to stance-width alters the stability for a set of feedforward tonic muscle activity gains and the delayed feedback neural command gains
  • Lucas
    • Nervous system minimizes energy within synergy constraints
      • Motor output system is organized into synergies
      • The nervous minimizes energy
    • Biomechanics constrains force production during postural control
    • Synergies and biomechanics constrain force production during postural control
  • Marcus
    • Muscle synergies are a consequence of thermodynamics
    • Synergies are highly reconfigurable on short time scales (adaptation can happen rapidly)
    • Neural muscular modes reflect the modes of the purely mechanical plant
  • Cecilia
    • The nervous system estimates task variables
      • The body perceives CoM motion
    • Perception of CoM is related to the biomechanical response of a postural perturbation
    • Sensory loss and motor impairment affect perception of CoM motion
    • Disuse affects perception of CoM motion
Proposed layout for mind-map
  • Observations
  • Hypotheses
  • Testable questions
Scientific method
  1. Observations (x- is true)
  2. Question (why x?)
  3. Hypothesis (x because of y)
  4. Prediction (if y, then x)
  5. Experiment (is y true)
    1. If true go to 1
    2. If false go to 2 choose new y