Download Motor Control Posture and Movement

Posture and Movement
System
Margo Prim Haynes, PT, DPT, MA, PCS
Mary Rose Franjoine, PT, DPT, MS, PCS
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


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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
Bi Pennate
Multi Pennate
Uni- Pennate
Penniform
Attachment
Angular
Parallel
Fiber Length
Short & Broad
Long & Slender
Configuration
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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
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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


Reactive
 Righting
& Equilibrium Reactions
 Modifies
Response due to environment
Proactive
& Task
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for movement (feedforward)
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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


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Pick up object from floor
Run & Jump
Transition in and out of chair
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Picture and Video
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