Adaptive Knee Joint Control for an Active Amputee Prosthesis

2008 ◽  
Author(s):  
Glauco Garcia Scandaroli ◽  
Geovany Araújo Borges ◽  
Adson Ferreira da Rocha ◽  
Francisco Assis de Oliveira Nascimento
Keyword(s):  
Knee Joint ◽  
Joint Control

Adaptive Control of Above Knee Electro-Hydraulic Prosthesis

1992 ◽  
Vol 114 (3) ◽  
pp. 421-424 ◽  
Author(s):  
T. K. Wang ◽  
M. S. Ju ◽  
Y. G. Tsuei
Keyword(s):  
Adaptive Control ◽  
Knee Joint ◽  
Knee Prosthesis ◽  
Adaptive Controller ◽  
Gait Pattern ◽  
Joint Control ◽  
Dynamic Coupling ◽  
Prosthetic Limb ◽  
Knee Joint Motion ◽  
Dimensional Simulation

Conventional designs of an above-knee prosthesis are based on mechanisms with mechanical properties (such as friction, spring and damping coefficients) that remain constant during changing cadence. These designs are unable to replace natural legs due to the lack of active knee joint control. Since the nonlinear and time-varying dynamic coupling between the thigh and the prosthetic limb is high during swing phase, an adaptive control is employed to control the knee joint motion. Two dimensional simulation indicates that the adaptive controller can improve the appearance of gait pattern. It is adaptable to walking speed and can compensate for the variations of hip moment, hip trajectory and toe-off conditions.

Gender and fatigue have influence on knee joint control strategies during landing

2009 ◽  
Vol 24 (1) ◽  
pp. 82-87 ◽  
Author(s):  
Dominic Gehring ◽  
Mark Melnyk ◽  
Albert Gollhofer
Keyword(s):  
Knee Joint ◽  
Control Strategies ◽  
Joint Control

scholarly journals Neuromuscular knee joint control in adolescents with and without generalised joint hypermobility during landing in the single leg hop for distance test

2014 ◽  
Vol 22 ◽  
pp. S335-S336
Author(s):  
T. Junge ◽  
J. Bloch Thorlund ◽  
K. Søgaard ◽  
N. Wedderkopp ◽  
B. Juul-Kristensen
Keyword(s):  
Knee Joint ◽  
Joint Hypermobility ◽  
Joint Control

Experimental quadriceps muscle pain impairs knee joint control during walking

2007 ◽  
Vol 103 (1) ◽  
pp. 132-139 ◽  
Author(s):  
Marius Henriksen ◽  
Tine Alkjær ◽  
Hans Lund ◽  
Erik B. Simonsen ◽  
Thomas Graven-Nielsen ◽  
...  
Keyword(s):  
Motor Control ◽  
Knee Joint ◽  
Knee Pain ◽  
Muscle Pain ◽  
Isotonic Saline ◽  
Quadriceps Muscle ◽  
Emg Activity ◽  
Joint Control ◽  
Peak Knee ◽  
Cardinal Symptom

Pain is a cardinal symptom in musculoskeletal diseases involving the knee joint, and aberrant movement patterns and motor control strategies are often present in these patients. However, the underlying neuromuscular mechanisms linking pain to movement and motor control are unclear. To investigate the functional significance of muscle pain on knee joint control during walking, three-dimensional gait analyses were performed before, during, and after experimentally induced muscle pain by means of intramuscular injections of hypertonic saline (5.8%) into vastus medialis (VM) muscle of 20 healthy subjects. Isotonic saline (0.9%) was used as control. Surface electromyography (EMG) recordings of VM, vastus lateralis (VL), biceps femoris, and semitendinosus muscles were synchronized with the gait analyses. During experimental muscle pain, the loading response phase peak knee extensor moments were attenuated, and EMG activity in the VM and VL muscles was reduced. Compressive forces, adduction moments, knee joint kinematics, and hamstring EMG activity were unaffected by pain. Interestingly, the observed changes persisted when the pain had vanished. The results demonstrate that muscle pain modulated the function of the quadriceps muscle, resulting in impaired knee joint control and joint instability during walking. The changes are similar to those observed in patients with knee pain. The loss of joint control during and after pain may leave the knee joint prone to injury and potentially participate in the chronicity of musculoskeletal problems, and it may have clinically important implications for rehabilitation and training of patients with knee pain of musculoskeletal origin.

Assessment of objective dynamic knee joint control in anterior cruciate ligament deficient and reconstructed individuals

The Knee ◽  
2019 ◽  
Vol 26 (3) ◽  
pp. 578-585 ◽  
Author(s):  
Kenneth B. Smale ◽  
Tine Alkjaer ◽  
Teresa E. Flaxman ◽  
Michael R. Krogsgaard ◽  
Erik B. Simonsen ◽  
...  
Keyword(s):  
Anterior Cruciate Ligament ◽  
Knee Joint ◽  
Cruciate Ligament ◽  
Joint Control ◽  
Anterior Cruciate ◽  
Anterior Cruciate Ligament Deficient

scholarly journals Influence of a Full-Body Compression Suit on Trunk Positioning and Knee Joint Mechanics During Lateral Movements

2017 ◽  
Vol 33 (4) ◽  
pp. 261-267
Author(s):  
Guillaume Mornieux ◽  
Elmar Weltin ◽  
Monika Pauls ◽  
Franz Rott ◽  
Albert Gollhofer
Keyword(s):  
Knee Joint ◽  
Internal Rotation ◽  
Female Athletes ◽  
Joint Control ◽  
Joint Mechanics ◽  
Joint Moments ◽  
Knee Joint Mechanics ◽  
Kinematics And Kinetics ◽  
Knee Joint Loading ◽  
Full Body

Trunk positioning has been shown to be associated with knee joint loading during athletic tasks, especially changes of direction. The purpose of the present study was to test whether a full-body compression suit (FBCS) would improve trunk positioning and knee joint control during lateral movements. Twelve female athletes performed lateral reactive jumps (LRJ) and unanticipated cuttings with and without the customized FBCS, while 3D kinematics and kinetics were measured. FBCS did not influence trunk positioning during LRJ and led to increased trunk lateral lean during cuttings (P < .001). However, while wearing FBCS, knee joint abduction and internal rotation angles were reduced during LRJ (P < .001 andP = .013, respectively), whereas knee joint moments were comparable during cuttings. FBCS cannot support the trunk segment during unanticipated dynamic movements. But, increased trunk lateral lean during cutting maneuvers was not high enough to elicit increased knee joint moments. On the contrary, knee joint abduction and internal rotation were reduced during LRJ, speaking for a better knee joint alignment with FBCS. Athletes seeking to improve trunk positioning may not benefit from a FBCS.

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