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Selected Publication:

Type of publication: Doctoral Thesis
Type of document:

Year: 2007

Authors: Katic, N

Title: Comparison of gait characteristics of dogs with degenerative joint disease of the coxofemoral joint and clinically sound dogs by means Fourier analysis.

Source: Dissertation, Vet. Med. Univ. Wien, pp. 99.

Authors Vetmeduni Vienna:

Katic Nikola

Advisor(s):
Peham Christian

Vetmed Research Units
University Clinic for Small Animals, Clinical Unit of Small Animal Surgery


Abstract:
Many methods have been developed to better understand and differentiate normal and abnormal gait in animals. Among the others, the assessment of ground reactions forces (GRF) is getting more and more important as a scientific and clinical tool for gait analysis. Many studies have analysed the most common GRF parameters (peak vertical force, mean vertical force and vertical impulse). However, none of the studies has dealt with changes in the shape of the force/time curve. This study has been focused on dogs suffering from degenerative joint disease of the hip joint. A group of dogs with coxarthrosis and two control groups of clinically sound dogs were walked on a treadmill with integrated force plates and the GRF collected. Fourier analysis of the force/time curves has been computed and the results statistically processed. This study has proven usability of Fourier analysis for evaluation of the changes of ground reaction force over time and detected changes in shape of the force/time curves that would have otherwise remained unnoticed. Namely, subtle changes in shape of the curves could be described and compared by use of only six Fourier coefficients. Apart from being able to rightly detect and describe lameness in hind limbs of dogs with degenerative joint disease of the hip, this method is successful in detecting subtle gait abnormalities reflected on fore limbs in animals with this condition. An improvement of the analysis of ground reaction forces by means of Fourier analysis and establishment of a mathematical method for more precise description of degenerative joint disease of canine hip as the aim of the study has been achieved. Fourier analysis can be used as a valuable tool for description of other lameness in dogs and other species.

Keywords:
Motion analysis / ground reaction force / Fourier analysis / Coxarthrosis / Dog


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