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Pressure distribution in Morton's foot structure.

M M Rodgers1, P R Cavanagh

  • 1Laboratory of Applied Physiology, Wright State University, Dayton, OH 45420.

Medicine and Science in Sports and Exercise
|February 1, 1989
PubMed
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Athletes with Morton foot structure (MFS) experience higher peak pressures under the second metatarsal head. This increased localized pressure may contribute to common MFS-related foot problems.

Area of Science:

  • Biomechanics
  • Podiatry
  • Sports Medicine

Background:

  • Morton foot structure (MFS) is characterized by a more distal second metatarsal head compared to the first.
  • MFS is frequently linked to various athletic foot ailments.
  • Abnormal metatarsal head loading patterns are hypothesized as the cause of these issues.

Purpose of the Study:

  • To investigate if MFS results in a distinct metatarsal head pressure profile compared to non-Morton feet.
  • To analyze plantar pressure distributions in individuals with and without MFS during walking.

Main Methods:

  • Plantar pressure data were collected from 45 subjects (30 MFS, 15 controls) using a 1000-element piezoceramic pressure platform.
  • Measurements were taken during a mid-gait step at walking speeds of 1.6-2 m/s.

Related Experiment Videos

  • Peak pressures and impulse values were analyzed for three forefoot regions.

    • Main Results:

    • Both MFS and control groups exhibited peak loading under the second metatarsal.
    • Significantly higher peak pressures were observed under the second metatarsal head in the MFS group (P < 0.005).
    • Forefoot pressure profiles showed similarities between groups, with notable differences in peak pressure magnitude.

    Conclusions:

    • While overall loading patterns are similar, MFS feet exhibit significantly elevated peak pressures at the second metatarsal head.
    • This increased localized pressure in MFS may predispose individuals to conditions associated with excessive forefoot pressure.
    • Understanding these pressure differences is crucial for addressing MFS-related athletic injuries.