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Muscle thixotropy-where are we now?

Martin Lakie1, Kenneth S Campbell2

  • 1School of Sport, Exercise and Rehabilitation, University of Birmingham , Birmingham , United Kingdom.

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|May 10, 2019
PubMed
Summary
This summary is machine-generated.

Skeletal muscle exhibits thixotropy, a time-dependent decrease in stiffness with movement. This phenomenon influences postural control and proprioception, with molecular insights from titin and cross-bridge cycling enhancing our understanding of muscle mechanics.

Keywords:
movementmuscle thixotropyposturerelaxed muscle

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Area of Science:

  • Biomechanics
  • Muscle Physiology
  • Human Movement Science

Background:

  • Skeletal muscle exhibits inherent resistance to movement, particularly stiffness at low amplitudes.
  • This stiffness is transient, developing during rest and diminishing with active or passive motion.
  • This time-dependent mechanical behavior is termed muscle thixotropy.

Purpose of the Study:

  • To review the phenomenon of muscle thixotropy and its role in postural control, especially during human standing.
  • To elucidate the association between thixotropy and muscle mechanics.
  • To explore the molecular underpinnings of thixotropic behavior in skeletal muscle.

Main Methods:

  • Review of existing literature on muscle thixotropy and its molecular basis.
  • Analysis of how titin and cross-bridge cycling influence thixotropy.
  • Tracking thixotropic stiffness changes via physiological tremor during posture-to-movement transitions.

Main Results:

  • Thixotropy is a well-established property of skeletal muscle mechanics.
  • Recent findings on titin and cross-bridge regulation provide insights into thixotropic mechanisms.
  • Physiological tremor can effectively monitor muscle stiffness variations during postural adjustments.

Conclusions:

  • Muscle thixotropy significantly impacts postural control and human standing.
  • Understanding the molecular basis of thixotropy involves both titin and cross-bridge cycling.
  • Thixotropic properties of muscle sensory receptors have implications for proprioception.