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STANDING BALANCE

STANDING BALANCE. Kate Ramadge Physiotherapist NSW PAR Day 30 th March 2007. What are:. Standing balance The ability to stand without using undue muscle activity, to move about in standing, to perform a wide variety of motor tasks,

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STANDING BALANCE

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  1. STANDING BALANCE Kate Ramadge Physiotherapist NSW PAR Day 30th March 2007

  2. What are: • Standing balance The ability to stand without using undue muscle activity, to move about in standing, to perform a wide variety of motor tasks, and to move in and out of the standing position.

  3. What are: • Postural adjustments Muscle activation patterns to control of the motion of several body segments relative to each other, to ensure the upcoming movement does not destabilise the body’s equilibrium.

  4. Contributors to PA’s • Vision • Vestibular system • Postural adjustments - strength - timing of muscle activity - co-ordination of multiple muscles • Proprioception

  5. Postural Adjustments:Task & Context Specificity Cordo & Nashner (1982) • Person pulls on handle: Gastrocs Hamstrings Biceps last Anticipation Internally generated B. Handle is pulled: Gastrocs Biceps No anticipation Externally imposed C. Handle is pulled and trunk supported: Biceps only Leg muscles not required as postural support D. Handle and floor are pulled: Biceps delayed

  6. Postural Adjustments: Essential features • Context specific • Modified by task being performed • Adaptive not reflex behaviour • Muscle actions change with alterations in base of support • Anticipatory: muscle activation occurs in anticipation of changes in centre of mass • Vision over-rides proprioception

  7. Vision Over-rides Proprioception • Wall moves away from person • Person perceives this as falling backwards C. Person falls forward to compensate Lee and Aronson (1974)

  8. Training Postural Adjustments  Train specific tasks eg reaching in sitting, standing • Patients need to learn which muscles to activate in anticipation of a change in COG • Need to train specific muscle actions for specific tasks

  9. Training Postural Adjustments • Patients need to practise in safety but with the opportunity challenge their postural adjustments Eg. Standing next to a wall without hand support instead of holding onto parallel bars • Postural adjustments occur in the joints adjacent to support surfaces (Slijper & Latash, 2000) (So, when should we issue a frame?)

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