Spectral analysis of knee isokinetic extension curves of osteoarthritic patients

被引:0
|
作者
Almosnino, Sivan [1 ,2 ,3 ]
Sled, Elizabeth A. [4 ]
Costigan, Patrick A. [2 ,3 ,4 ]
Chalmers, Alison [4 ]
Stevenson, Joan M. [2 ,3 ,4 ]
机构
[1] Kingston Gen Hosp, Syl & Molly Apps Med Res Ctr, Human Mobil Res Ctr, Kingston, ON K7L 2V7, Canada
[2] Queens Univ, Human Mobil Res Ctr, Kingston, ON, Canada
[3] Queens Univ, Sch Kinesiol & Hlth Studies, Biomech & Ergon Lab, Kingston, ON, Canada
[4] Queens Univ, Sch Rehabil Therapy, Kingston, ON, Canada
关键词
FREQUENCY-DOMAIN ANALYSIS; GROUND REACTION FORCES; TIME; STRENGTH; HEALTHY; WALKING;
D O I
10.3233/IES-2010-0383
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
Isokinetic assessment of knee extensors muscle group function in patients suffering from knee osteoarthritis has exclusively been achieved using time-domain based variables. While useful, these analyses do not quantify the conspicuously irregular moment-time pattern exhibited by the involved knee when compared to the contralateral knee. The purpose of this investigation was to assess whether the frequency content of the isokinetic curve can quantify this latter phenomenon. Thirty two patients with knee osteoarthritis participated in this study. Each participant performed 5 maximal concentric knee extensions bilaterally at 60 degrees/s using an isokinetic dynamometer. For each time-domain extension curve, the power spectrum was calculated via Fast Fourier Transform and the maximum frequency content value contained within 99% of total signal power was extracted. Of the 32 participants, 26 exhibited higher frequency contents in the isokinetic curves obtained from their involved knee (p = 0.002, effect size = 0.35). The results suggest that the frequency content of isokinetic moment-time curves may provide useful quantitative information regarding the smoothness of moment production, and as such, may be used in conjunction with traditional time-domain variables in the assessment of knee extensors function in patients suffering from knee osteoarthritis.
引用
收藏
页码:189 / 192
页数:4
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