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Manual forces applied during cervical mobilization.

Suzanne J Snodgrass1, Darren A Rivett, Val J Robertson

  • 1Discipline of Physiotherapy, The University of Newcastle, Callaghan, NSW, Australia. suzanne.snodgrass@newcastle.edu.au

Journal of Manipulative and Physiological Therapeutics
|January 17, 2007
PubMed
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Manual therapists applying joint mobilization to the cervical spine show significant variation in force application between individuals, yet maintain high consistency within their own practice. This highlights variability in manual therapy techniques for neck disorders.

Area of Science:

  • Orthopedics
  • Physical Therapy
  • Biomechanics

Background:

  • Manual therapists frequently employ passive accessory mobilization for mechanical neck disorders.
  • Quantifying the precise manual forces applied during cervical spine mobilization is crucial but not well-established.

Observation:

  • Ten physical therapists performed posterior-to-anterior mobilizations on C2 and C7 vertebrae in an asymptomatic subject.
  • Manual forces were measured in three planes using an instrumented treatment table, demonstrating high reliability and accuracy.

Findings:

  • Significant inter-therapist variability was observed in mean peak force, force amplitude, and oscillation frequency across different mobilization grades.
  • Mean peak forces were lower than those reported for lumbar mobilizations.

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  • Intratherapist repeatability was high, suggesting consistent application by individual therapists.

    • Implications:

    • Cervical mobilization forces differ substantially between practitioners, impacting treatment consistency.
    • While individual therapists are repeatable, standardized definitions and application of mobilization grades require further investigation.
    • This research provides foundational data for understanding and potentially standardizing cervical mobilization techniques.