Effects of Pain on Lumbar Spine Movement and Muscle Activity Patterns

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Questions and Answers

How does the presence of pain in the lumbopelvic region affect muscle activity patterns in the lumbar spine?

  • Results in reorganization of muscle representation in the motor cortex. (correct)
  • Leads to differential activation of individual muscles through cortical stimulation.
  • Increases muscle activation in all individual muscles through cortical stimulation.
  • Enhances fine motor control between synergistically linked trunk muscles.

What is a common observation regarding muscle fibre type in individuals with acute and chronic pain?

  • Decreased proportion of fast-twitch type-II glycolytic fibres.
  • Increased proportion of Type 1 slow-twitch fibres.
  • Increased proportion of fast-twitch type-II glycolytic fibres. (correct)
  • No changes in muscle fibre type.

What effect does chronic musculoskeletal pain have on muscle activation characteristics?

  • No effect on cortical motor drive or movement patterns.
  • Leads to increased Type 1 slow-twitch muscle fibres.
  • Reflects the collective role of changes in cortical motor drive, muscle tissue, and movement patterns. (correct)
  • Does not reflect changes in muscle tissue.

What is a key finding related to central nervous system changes in individuals with low back pain?

<p>Lack of differential activation of individual muscles through cortical stimulation. (C)</p> Signup and view all the answers

How do changes in the motor unit recruitment patterns manifest in individuals with acute and chronic pain?

<p>Reflect altered muscle fibre type at the peripheral muscle level. (C)</p> Signup and view all the answers

What do studies suggest about adaptive muscle activation changes related to Low Back Pain (LBP)?

<p>Variation exists in the type and patterns of adaptive (and/or maladaptive) muscle activation changes. (A)</p> Signup and view all the answers

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