Effects of spinal cord injury on lower-limb passive joint moments revealed through a nonlinear viscoelastic model

被引:46
作者
Amankwah, K [1 ]
Triolo, RJ [1 ]
Kirsch, R [1 ]
机构
[1] Case Western Reserve Univ, Biomed Engn Dept, Cleveland, OH 44106 USA
关键词
biological models; biomechanics; elasticity; nonlinear models; passive moments; spinal cord injury; viscoelasticity;
D O I
10.1682/JRRD.2004.01.0015
中图分类号
R49 [康复医学];
学科分类号
100215 ;
摘要
We developed a mathematical model to describe the lower-limb passive joint moments to investigate and compare these moments in a small sample of able-bodied volunteers and individuals with long-standing motor complete paraplegia. Iso-kinetic tests, which were performed on a sample of four subjects with spinal cord injuries (SCIs) and five uninjured individuals, measured the passive moments at the ankle, knee, and hip joints throughout their ranges of motion in the sagittal and coronal planes. We fitted an 11-parameter nonlinear viscoelastic model to the acquired passive moment data (mean square error ranging from 0.020 to 5.1 Nm(2)) to compare subject populations and to determine the influences of joint velocity and passive coupling between adjacent joints. Although the passive moment curves of the SCI and able-bodied groups exhibited many similarities in shape, a repeated measures analysis of variance (ANOVA) that compared the passive moment curves of the two groups indicated a statistically significant (p < 0.01) difference for every joint except the knee. This new model for passive joint moments should prove to be useful in examining how changes in passive proper-ties affect bipedal function and movement.
引用
收藏
页码:15 / 31
页数:17
相关论文
共 39 条
[21]   AN ANALYSIS OF SIT-TO-STAND MOVEMENTS [J].
KOTAKE, T ;
DOHI, N ;
KAJIWARA, T ;
SUMI, N ;
KOYAMA, Y ;
MIURA, T .
ARCHIVES OF PHYSICAL MEDICINE AND REHABILITATION, 1993, 74 (10) :1095-1099
[22]   ANALYSIS OF STANDING UP AND SITTING DOWN IN HUMANS - DEFINITIONS AND NORMATIVE DATA PRESENTATION [J].
KRALJ, A ;
JAEGER, RJ ;
MUNIH, M .
JOURNAL OF BIOMECHANICS, 1990, 23 (11) :1123-1138
[23]   Interrelation of creep and relaxation: A modeling approach for ligaments [J].
Lakes, RS ;
Vanderby, R .
JOURNAL OF BIOMECHANICAL ENGINEERING-TRANSACTIONS OF THE ASME, 1999, 121 (06) :612-615
[24]   Passive dynamics of the knee joint in healthy children and children affected by spastic paresis [J].
Lebiedowska, MK ;
Fisk, JR .
CLINICAL BIOMECHANICS, 1999, 14 (09) :653-660
[25]   THE PASSIVE ELASTIC MOMENT AT THE KNEE AND ITS INFLUENCE ON HUMAN GAIT [J].
MANSOUR, JM ;
AUDU, ML .
JOURNAL OF BIOMECHANICS, 1986, 19 (05) :369-373
[26]  
MCFAULL SR, 1993, 14 ISB C PAR FRANC
[27]  
MENDENHALL W, 1992, STAT ENG SCI, P963
[28]  
Patrick JH, 2002, SPINAL CORD, V40, P421, DOI 10.1038/sj.sc.3101340
[29]   MEASUREMENT OF NONLINEAR, COUPLED STIFFNESS CHARACTERISTICS OF HUMAN KNEE [J].
PIZIALI, RL ;
RASTEGAR, JC ;
NAGEL, DA .
JOURNAL OF BIOMECHANICS, 1977, 10 (01) :45-51
[30]   Identification of passive elastic joint moments in the lower extremities [J].
Riener, R ;
Edrich, T .
JOURNAL OF BIOMECHANICS, 1999, 32 (05) :539-544