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10 Cards in this Set

  • Front
  • Back
quiet stance and postural tone
-certain muscles have a low level of activity to maintain alignment and control
what controls the knee
-ligamentous locking
what controls the hip
-TFL, glut med
what controls the spine
-erector spinae, abdominals
feedback control
-relies on sensation from a disturbance to balance
-adjustments are made to the activity of the postural muscles in response to a perturbation
feedforward control
-anticipates the disturbance to balance, based on past experience, and implements a strategy to control balance
-signals sent from CNS to the postural muscles prior to movement
when is ankle strategy useful?
-when disturbances to balance are small
-when the surface that one is standing on is firm
-when the ankle range of motion and strength are intact
when is hip strategy useful
-w/ large, fast perturbations to balance
-when the support surface is small
-when support surface is compliant
stepping strategy
-when the ankle or hip strategies are not sufficient to control the COM, a step will restore equilibrium
lateral stability
-alternative strategies used to recover stability in mediolateral direction
-muscle patterns organized in a proximal to distal direction
-muscles at the hip and trunk rule