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First metatarsocuneiform motion: a radiographic and statistical analysis

G R Fritz1, D Prieskorn

  • 1Department of Orthopaedic Surgery, Botsford General Hospital, Farmington Hills, Michigan 48336, USA.

Foot & Ankle International
|March 1, 1995
PubMed
Summary
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First ray hypermobility in asymptomatic feet is linked to thumb hyperflexibility. This study establishes normal first metatarsocuneiform motion values, finding no correlation with age, sex, or foot shape.

Area of Science:

  • Biomechanics
  • Podiatry
  • Orthopedics

Background:

  • The first metatarsocuneiform (MTC) joint is crucial for foot function and propulsion.
  • Understanding normal motion and factors influencing MTC joint mechanics is essential for diagnosing and treating foot pathologies.
  • Asymptomatic feet provide a baseline for establishing normative data.

Purpose of the Study:

  • To evaluate first MTC joint motion in asymptomatic feet.
  • To establish normal sagittal range of motion values for the first ray.
  • To investigate correlations between first ray motion, foot morphology, and various physical characteristics.

Main Methods:

  • Physical examination, radiographic analysis, and questionnaires were administered to 50 volunteers (100 asymptomatic feet).

Related Experiment Videos

  • First ray sagittal range of motion was measured.
  • Distal cuneiform shape was classified using three methods; correlations with motion and other variables were analyzed.

    • Main Results:

    • Normal first ray sagittal range of motion was determined to be 4.37 degrees (SD, +/- 3.4 degrees).
    • Thumb hyperflexibility was found to correlate significantly with first ray hypermobility.
    • No significant correlations were observed between first ray motion and sex, age, intermetatarsal angle, side, skin stretch, knee/elbow hyperextension, or distal cuneiform shape.

    Conclusions:

    • This study provides normative data for first MTC joint motion in asymptomatic individuals.
    • Thumb hyperflexibility is identified as a potential indicator of first ray hypermobility.
    • Several common factors, including foot shape and demographic variables, do not appear to influence first ray motion.