Correlations between residual limb length and joint moments during sitting and standing movements in transfemoral amputees

2015 ◽  
Vol 40 (4) ◽  
pp. 522-527 ◽  
Author(s):  
M Jason Highsmith ◽  
Derek J Lura ◽  
Stephanie L Carey ◽  
Larry J Mengelkoch ◽  
Seok Hun Kim ◽  
...  
Keyword(s):  
Knee Joint ◽  
Lower Limb ◽  
Clinical Relevance ◽  
Moment Magnitude ◽  
Limb Length ◽  
Residual Limb ◽  
Joint Moments ◽  
Sit To Stand ◽  
Transfemoral Amputees ◽  
Amputation Surgery

Background and aim: Longer residual limb lengths provide an increased lever arm. Longer residual limbs may produce increased joint moments; the two may be correlated. These correlations have not been evaluated in transfemoral amputees during transitional movements. Correlations between residual limb length and involved side joint moment could contribute to justification supporting maximal residual limb length preservation. This study investigated possible correlations between hip or knee moment and residual limb length. Technique: Hip and knee joint moments were determined while 21 transfemoral amputees performed sitting and standing movements and then evaluated for correlation with residual limb length. Discussion: Residual limb length was not correlated with either knee or involved side hip moments during sit to stand or stand to sit. Conversely, weak inverse correlations ( p < 0.05) existed between sound hip moment magnitude and residual limb length. These correlations suggest that in community ambulating transfemoral amputees, longer residual limb length could decrease sound hip kinetic burden during transitional movement. Beyond correlations between residual limb length and sound hip transitional movement kinetics, there are other considerations in determining residual limb length during amputation. Clinical relevance This study examines relationships between lower limb joint moments and residual limb length related to sit-to-stand and stand-to-sit activities. The results have implications for amputation surgery and rehabilitation.

Research on the Rehabilitation Robot Control Methods for Analysis of Lower Limb Kinetics during Sit to Stand Process

2015 ◽  
Vol 742 ◽  
pp. 535-539
Author(s):  
Kun Liu ◽  
Jian Chen Zhao ◽  
En Guo Cao ◽  
Xuan Han
Keyword(s):  
Lower Limb ◽  
Control Method ◽  
Center Of Pressure ◽  
Rehabilitation Robot ◽  
Control Methods ◽  
Real Time Control ◽  
Joint Moments ◽  
Kinetics Parameters ◽  
Movement Trajectories ◽  
Sit To Stand

A new method for analyzing lower limb kinetics during sit to stand process is presented, and a trajectory control method (TCM) and an impedance control method (ICM) for a rehabilitation robot are developed. During the sit to stand process (SSP), body segment rotational angles, movement trajectories, ground reaction forces (GRF), center of pressure (COP) and rope tensile forces are measured by the robot sensor system, and the joint moments of ankle, knee and hip are calculated in real-time control program. Test experiments were performed on six volunteers. The experimental results validate the theory that the control methods can assure the accomplishment of the sit to stand process in comfortable postures, and improve the condition of joint moments. The control methods are suitable for self-supported home training, and can be applied to assess kinetics parameters during the sit to stand process and improve the rehabilitation of patients.

Factors affecting stair-ascent patterns in unilateral transfemoral amputees

2012 ◽  
Vol 37 (3) ◽  
pp. 222-226 ◽  
Author(s):  
Hiroaki Hobara ◽  
Yoshiyuki Kobayashi ◽  
Shuichi Tominaga ◽  
Takashi Nakamura ◽  
Nobuya Yamasaki ◽  
...  
Keyword(s):  
Limb Length ◽  
Stair Climbing ◽  
Limiting Factor ◽  
Residual Limb ◽  
Cross Sectional Survey ◽  
Assessment Index ◽  
Factors Affecting ◽  
Transfemoral Amputee ◽  
Stair Ascent ◽  
Transfemoral Amputees

Background:Patterns and ease of stair ambulation influence amputees’ level of satisfaction with their rehabilitation, confidence level, and motivation for continued rehabilitation, demonstrating the importance of stair-ascent data for rehabilitation. However, little is known about the determinants of stair-ascent patterns in unilateral transfemoral amputees.Objectives:To investigate the factors affecting stair-ascent patterns in transfemoral amputees.Study Design:Cross-sectional survey.Methods:Stair-ascent patterns were evaluated using the Stair Assessment Index. We collected Stair Assessment Index data as well as demographic and clinical data (sex, age, height, mass, amputation side, reason for amputation, time since amputation, and residual limb length) from 25 transfemoral amputees.Results:Statistical analyses revealed that age was negatively correlated and time since amputation was positively correlated with Stair Assessment Index. In contrast, height, body mass, and residual limb lengths were not correlated with Stair Assessment Index.Conclusion:The results of this study suggest that in unilateral transfemoral amputee, (1) both age and time since amputation could affect stair-climbing patterns and (2) residual limb length should not be a limiting factor for stair climbing if the transfemoral amputee has a certain minimum residual limb length.Clinical relevanceRehabilitation teams should carefully consider nonmodifiable predisposing factors such as age and time since amputation. However, they may be able to carry on stair-ascent rehabilitation for transfemoral amputees disregarding residual limb length (depending on the length).

Side difference in the hip and knee joint moments during sit-to-stand and stand-to-sit tasks in individuals with hemiparesis

2007 ◽  
Vol 22 (7) ◽  
pp. 795-804 ◽  
Author(s):  
Guylaine Roy ◽  
Sylvie Nadeau ◽  
Denis Gravel ◽  
France Piotte ◽  
Francine Malouin ◽  
...  
Keyword(s):  
Knee Joint ◽  
Joint Moments ◽  
Sit To Stand

Leg Dominance May Not Be a Predictor of Asymmetry in Peak Joint Moments and Ground Reaction Forces During Sit-to-Stand Movements

2014 ◽  
Vol 30 (1) ◽  
pp. 179-183 ◽  
Author(s):  
Jonathon S. Schofield ◽  
Eric Parent ◽  
Justin Lewicke ◽  
Jason P. Carey ◽  
Marwan El-Rich ◽  
...  
Keyword(s):  
Lower Limb ◽  
Inverse Dynamics ◽  
Bilateral Symmetry ◽  
Joint Moment ◽  
Ground Reaction Forces ◽  
Joint Moments ◽  
Sit To Stand ◽  
Reaction Forces ◽  
Three Body ◽  
Leg Dominance

Sit-to-stand transfer is a common prerequisite for many daily tasks. Literature often assumes symmetric behavior across the left and right side. Although this assumption of bilateral symmetry is prominent, few studies have validated this supposition. This pilot study uniquely quantifies peak joint moments and ground reaction forces (GRFs), using a Euclidian norm approach, to evaluate bilateral symmetry and its relation to lower limb motor-dominance during sit to stand in ten healthy males. Peak joint moments and GRFs were determined using a motion capture system and inverse dynamics. This analysis included joint moment contributions from all three body planes (sagittal, coronal, and axial) as well as vertical and shearing GRFs. A paired, one-tailedttest was used, suggesting asymmetrical joint moment development in all three lower extremity joints as well as GRFs (P< .05). Furthermore, using an unpaired two-tailedttest, asymmetry developed during these movements does not appear to be predictable by participants’ lower limb motor-dominance (P< .025). Consequently, when evaluating sit-to-stand it is suggested the effects of asymmetry be considered in the interpretation of data. The absence of a relationship between dominance and asymmetry prevents the suggestion that one side can be tested to infer behavior of the contralateral.

Three-Dimensional Knee Joint Moments During Performance of the Bodyweight Squat: Effects of Stance Width and Foot Rotation

2013 ◽  
Vol 29 (1) ◽  
pp. 33-43 ◽  
Author(s):  
Sivan Almosnino ◽  
David Kingston ◽  
Ryan B. Graham
Keyword(s):  
Knee Joint ◽  
Internal Rotation ◽  
Rotation Angle ◽  
Three Dimensional ◽  
Principal Component ◽  
Moment Magnitude ◽  
Joint Moments ◽  
Flexion Moment ◽  
Knee Joint Moment ◽  
Healthy Participants

The purpose of this investigation was to assess the effects of stance width and foot rotation angle on three-dimensional knee joint moments during bodyweight squat performance. Twenty-eight participants performed 8 repetitions in 4 conditions differing in stance or foot rotation positions. Knee joint moment waveforms were subjected to principal component analysis. Results indicated that increasing stance width resulted in a larger knee flexion moment magnitude, as well as larger and phase-shifted adduction moment waveforms. The knee’s internal rotation moment magnitude was significantly reduced with external foot rotation only under the wide stance condition. Moreover, squat performance with a wide stance and externally rotated feet resulted in a flattening of the internal rotation moment waveform during the middle portion of the movement. However, i is speculated that the differences observed across conditions are not of clinical relevance for young, healthy participants.

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