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Muscle tone 11

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Muscle tone 11

  1. 1. MUSCLE TONE CONTINUUM 2012 Jan McElroy PT, PhD, PCS, C/NDT
  2. 2. WHAT IS “MUSCLE TONE” INSKELETAL MUSCLES?Consistencies in muscle tone definitions:1. muscle activity at rest (Campbell)2. a state of partial contraction present in a muscle in it’s passive state (medical dictionary)3. resistance to muscle stretch (passive) 1, 2
  3. 3. “TONE”  Can describe a single muscle, a group of muscles, a single or multiple limbs or trunk, or the entire body  A general term  Measures tend to be estimates, very subjective
  4. 4. Characteristics of Tone Both intrinsic and reflex components 2, 3 Is dynamic and changes within it’s usual range depending on emotions, illness/health, arousal etc. “Tone” can be compared to the level of the “idle” of a car
  5. 5. The ContinuumNo firing High level of Normal Range firing fibers of fibers
  6. 6. The ContinuumNo firing • CNS etiology of fibers = Flaccid • Peripheral etiology
  7. 7. Flaccidity CNS etiology: • Cancer • TBI Peripheral etiology: • Brachial Plexus Injury • Trauma • Spinal Cord Injury
  8. 8. The ContinuumFlaccid High level Normal Range firing LOW of TONE fibers
  9. 9. Postures Typical or Normal LOW TONE
  10. 10. Postures Typical or Normal LOW TONE
  11. 11. Movement Typical or Normal LOW TONE

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