Adaptive response of human tendon to paralysis

被引:67
作者
Maganaris, CN [1 ]
Reeves, ND
Rittweger, J
Sargeant, AJ
Jones, DA
Gerrits, K
De Haan, A
机构
[1] Manchester Metropolitan Univ, Inst Biophys & Clin Res Human Movement, Alsager ST7 2HL, England
[2] Univ Birmingham, Sch Sport & Exercise Sci, Birmingham, W Midlands, England
[3] Vrije Univ Amsterdam, Inst Fundamental & Clin Human Movement Sci, Amsterdam, Netherlands
关键词
disuse; dynamometry; rehabilitation; spinal cord injury; tendon; ultrasonography;
D O I
10.1002/mus.20441
中图分类号
R74 [神经病学与精神病学];
学科分类号
摘要
To gain insight into the adaptive response of human tendon to paralysis, we compared the mechanical properties of the in vivo patellar tendon in six men who were spinal cord-injured (SCl) and eight age-matched, able-bodied men. Measurements were taken by combining dynamometry, electrical stimulation, and ultrasonography. Tendon stiffness and Young's modulus, calculated from force-elongation and stress-strain curves, respectively, were lower by 77% (P < 0.01) and 59% (P < 0.05) in the SCI than able-bodied subjects. The cross-sectional area (CSA) of the tendon was 17% smaller (P < 0.05) in the SCI subjects, but there was no difference in tendon length between the two groups. Our results indicate that paralysis causes substantial deterioration of the structural and material properties of tendon. This needs to be taken into consideration in the design of electrical stimulation protocols for rehabilitation and experimental purposes, and when interpreting changes in the contractile speed of paralyzed muscle.
引用
收藏
页码:85 / 92
页数:8
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