Analysis and prediction of multi-joint coupling torque of fingers

Author(s):  
Jinxu Yu ◽  
Lin Zheng ◽  
Xiaolin Bai ◽  
Yihao Du ◽  
Lijie Zhang ◽  
...  
Keyword(s):  
Author(s):  
Charles Deltour ◽  
Bart Dingenen ◽  
Filip Staes ◽  
Kevin Deschamps ◽  
Giovanni A. Matricali

Background: Foot–ankle motion is affected by chronic ankle instability (CAI) in terms of altered kinematics. This study focuses on multisegmental foot–ankle motion and joint coupling in barefoot and taped CAI patients during the three subphases of stance at running. Methods: Foot segmental motion data of 12 controls and 15 CAI participants during running with a heel strike pattern were collected through gait analysis. CAI participants performed running trials in three conditions: barefoot running, and running with high-dye and low-dye taping. Dependent variables were the range of motion (RoM) occurring at the different inter-segment angles as well as the cross-correlation coefficients between predetermined segments. Results: There were no significant RoM differences for barefoot running between CAI patients and controls. In taped conditions, the first two subphases only showed RoM changes at the midfoot without apparent RoM reduction compared to the barefoot CAI condition. In the last subphase there was limited RoM reduction at the mid- and rearfoot. Cross-correlation coefficients highlighted a tendency towards weaker joint coupling in the barefoot CAI condition compared to the controls. Joint coupling within the taped CAI conditions did not show optimization compared to the barefoot CAI condition. Conclusions: RoM was not significantly changed for barefoot running between CAI patients and controls. In taped conditions, there was no distinct tendency towards lower mean RoM values due to the mechanical restraints of taping. Joint coupling in CAI patients was not optimized by taping.


2007 ◽  
Vol 31 (2) ◽  
pp. 167-190 ◽  
Author(s):  
Zhang Ying ◽  
Yao Yan-An ◽  
Cha Jian-Zhong

This paper proposed a novel concept of active balancer for dynamic balancing of planar mechanisms. Somewhat similar to a vibration absorber, the active balancer is designed as an independent device, which is placed outside of the mechanism to be balanced and can be installed easily. It consists of a two degree-of-freedom (DOF) linkage with two input shafts, one of which is connected to the output shaft of the mechanism to be balanced by a joint coupling, and the other one is driven by a controllable motor. Flexible dynamic balancing adapted to different working conditions can be achieved by varying speed trajectories of the control motor actively. A design method is developed for selecting suitable speed trajectories and link parameters of the two DOF linkage of the balancer to meet various design requirements and constraints. Numerical examples are given to demonstrate the design procedure and to verify the feasibility of the proposed concept.


2018 ◽  
Vol 19 (3) ◽  
pp. 322-332
Author(s):  
Gareth Irwin ◽  
David G. Kerwin ◽  
Genevieve Williams ◽  
Richard E. A. Van Emmerik ◽  
Karl M. Newell ◽  
...  

2009 ◽  
Vol 18 (3) ◽  
pp. 375-388 ◽  
Author(s):  
Lindsay K. Drewes ◽  
Patrick O. McKeon ◽  
Gabriele Paolini ◽  
Patrick Riley ◽  
D. Casey Kerrigan ◽  
...  

Context:Kinematic patterns during gait have not been extensively studied in relation to chronic ankle instability (CAI).Objective:To determine whether individuals with CAI demonstrate altered ankle kinematics and shank-rear-foot coupling compared with controls during walking and jogging.Design:Case control.Setting:Motion-analysis laboratory.Participants:7 participants (3 men, 4 women) suffering from CAI (age 24.6 ± 4.2 y, height 172.6 ± 9.4 cm, mass 70.9 ± 8.1 kg) and 7 (3 men, 4 women) healthy, matched controls (age 24.7 ± 4.5 y, height 168.2 ± 5.9 cm, mass 66.5 ± 9.8 kg).Interventions:Subjects walked and jogged on a treadmill while 3-dimensional kinematics of the lower extremities were captured.Main Outcome Measures:The positions of rear-foot inversion–eversion and shank rotation were calculated throughout the gait cycle. Continuous relative-phase angles between these segments were calculated to assess coupling.Results:The CAI group demonstrated more rear-foot inversion and shank external rotation during walking and jogging. There were differences between groups in shank-rear-foot coupling during terminal swing at both speeds.Conclusions:Altered ankle kinematics and joint coupling during the terminal-swing phase of gait may predispose a population with CAI to ankle-inversion injuries. Less coordinated movement during gait may be an indication of altered neuromuscular recruitment of the musculature surrounding the ankle as the foot is being positioned for initial contact.


2020 ◽  
pp. 1-15
Author(s):  
Collin Herb ◽  
Luke Donovan ◽  
Mark Feger ◽  
Silvia Blemker ◽  
Joe Hart ◽  
...  

2015 ◽  
Vol 6 ◽  
Author(s):  
Pauline Soh ◽  
Balaji Narayanan ◽  
Sabin Khadka ◽  
Vince D. Calhoun ◽  
Matcheri S. Keshavan ◽  
...  

2005 ◽  
Vol 38 (3) ◽  
pp. 477-483 ◽  
Author(s):  
Reed Ferber ◽  
Irene McClay Davis ◽  
Dorsey S. Williams
Keyword(s):  

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