Posture and Movement System

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Posture and MovementSystem

• Margo Prim Haynes, PT, DPT, MA, PCS
• Mary Rose Franjoine, PT, DPT, MS, PCS

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Posture and Movement

• Functional skills are controlled by two
  different but complementary subsystems, one for
  posture and one for movement.

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What is Posture?
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Functions of Postural System

• Maintain alignment of the body by overcoming the
  effects of gravity in all positions at all times
  (postural tone)
• Preserving joint integrity
• Maintain COM within BOS
• Prepare the body for movement

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What is Movement?
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Function of Movement System

• Provide mobility of various body segments in
  space.
• Initiation
• Continuation / (sustain)
• Termination
• Allows expression of well timed, coordinated,
  sequenced fluid movement

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To Climb
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• we need both systems to work efficiently but
  most importantly

together
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What functions allow for each system to be unique
and role specific?
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The Role of the Muscles
Postural System Movement System
Configuration Bi Pennate Multi Pennate Uni- Pennate Penniform
Attachment Angular Parallel
Fiber Length Short Broad Long Slender
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Multifidus Muscle
Postural System http//en.wikipedia.org/wiki
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Movement System http//en.wikipedia.org/wiki
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Gluteus Medius
http//en.wikipedia.org/wiki
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Duel Role of Gluteus Medius
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The Role of the Peripheral Nervous System Motor
Units

• Posture System
• Unit type S
• Slow to fatigue
• Contraction speed slow
• Rich capillary action

• Movement System
• Motor unit types
• FR resist fatigue
• FF fatigue rapidly

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What is.

• Postural Control?
• Balance ?
• Functional Balance?

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Postural Control

• Steady State Postural Control
• Maintain the COM within BOS
• Sway Strategies
• Dynamic Postural Control
• Anticipatory
• Prepares for movement (feedforward)
• Reactive
• Righting Equilibrium Reactions
• Proactive
• Modifies Response due to environment Task

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Postural Control

• Interaction of Multi-systems that influence the
  motor output
• Response ..

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Balance

• Balance what we see and measure clinically
• How we measure Balance?
• Steady State Balance
• Anticipatory Balance
• Proactive Balance
• Reactive Balance

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Functional Balance is

• Integration of the postural and movement system
  which allows us to freely move in space to
  complete our desired functional tasks with
  orientation of the body in space and fluid
  execution of the movement.
• Example
• Pick up object from floor
• Run Jump
• Transition in and out of chair

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Picture and Video