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Gait Analysis of Age-dependent Motor Impairments in Mice with Neurodegeneration
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Pathological gaits: inefficiency is not a rule.

L Tesio1, G S Roi, F Möller

  • 1Department of Orthopaedics and Rehabilitation, Istituto Scientifico Ospedale San Raffaele, Milan, Italy.

Clinical Biomechanics (Bristol, Avon)
|August 7, 2013
PubMed
Summary
This summary is machine-generated.

This study analyzed gait cost in patients with hemiplegia, above-knee amputation, and paraplegia. Gait efficiency differs significantly in amputees and paraplegics compared to normal subjects.

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Area of Science:

  • Biomechanics
  • Human locomotion
  • Gait analysis

Background:

  • Gait efficiency, measured as energy expenditure per unit distance, is crucial for locomotion.
  • This efficiency is intrinsically linked to walking speed and the underlying biomechanical mechanisms.
  • Pathological gaits often exhibit altered energy costs compared to normal locomotion.

Purpose of the Study:

  • To compare the cost of gait at corresponding speeds between individuals with hemiplegia, above-knee amputation, paraplegia, and normal subjects.
  • To identify if pathological gait cost-speed functions exhibit an optimal speed similar to normal gait.
  • To quantify the differences in gait cost between various pathological conditions and normal gait.

Main Methods:

  • Utilized polynomial regression analysis on existing literature data.
  • Compared cost-speed functions across different patient groups (hemiplegic, above-knee amputee, paraplegic) and normal subjects.
  • Focused analysis on speeds achievable by the patient populations.

Main Results:

  • All pathological gaits demonstrated a minimum cost at an optimal speed, analogous to normal gait.
  • Gait cost-speed functions were significantly different from normal in above-knee amputees (38% increase in minimum cost) and paraplegics (11% increase).
  • Hemiplegic gait cost did not significantly differ from normal gait within the studied speed range.

Conclusions:

  • The cost of gait is significantly impacted by specific pathological conditions, particularly above-knee amputation and paraplegia.
  • Despite a more severe impairment, paraplegic gait shows a smaller increase in minimum cost compared to above-knee amputee gait.
  • Gait analysis in pathological conditions reveals distinct biomechanical adaptations and energy expenditure patterns relative to normal locomotion.