Analysis of functional electrical stimulation parameters by muscular contraction time and knee joint angular variation

2013 ◽  
Vol 3 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Eddy Krueger ◽  
Eduardo Mendonça Scheeren ◽  
Guilherme Nunes Nogueira-Neto ◽  
Eduardo Borba Neves ◽  
Vera Lúcia da Silveira Nantes Button ◽  
...  
Author(s):  
Christine Azevedo Coste ◽  
Vance Bergeron ◽  
Rik Berkelmans ◽  
Emerson Fachin Martins ◽  
Ché Fornusek ◽  
...  

Functional Electrical Stimulation (FES) can elicit muscular contraction and restore motor function in paralyzed limbs. FES is a rehabilitation technique applied to various sensorimotor deficiencies and in different functional situations, e.g. grasping, walking, standing, transfer, cycling and rowing. FES can be combined with mechanical devices. FES-assisted cycling is mainly used in clinical environments for training sessions on cycle ergometers, but it has also been adapted for mobile devices, usually tricycles. In October 2016, twelve teams participated in the CYBATHLON competition in the FES-cycling discipline for persons with motor-complete spinal cord injury. It was the first event of this kind and a wide variety of strategies, techniques and designs were employed by the different teams in the competition. The approaches of the teams are detailed in this special issue. We hope that the knowledge contained herein, together with recent positive results of FES for denervated degenerating muscles, will provide a solid basis to encourage improvements in FES equipment and open new opportunities for many patients in need of safe and effective FES management. We hope to see further developments and/or the benefit of new training strategies at future FES competitions, e.g. at the Cybathlon 2020 (www.cybathlon.ethz.ch).


1987 ◽  
Vol 11 (2) ◽  
pp. 75-79 ◽  
Author(s):  
P. J. Pacy ◽  
R. H. Evans ◽  
D. Halliday

The influence of anaerobic and aerobic exercise, promoted by computer regulated functional electrical stimulation (FES) was evaluated in four paraplegic males. Quadriceps muscle bulk was monitored by serial computerised axial tomography (CT) scanning and histology by muscle biopsies from the vastus intermedins. Anaerobic exercise consisted of 60 degree straight leg raising against increasing weights (range 1.4-11.4 kg) over a period of ten weeks. Aerobic exercise consisted of pedalling a modified Monark bicycle ergometer at 50 rpm against a fixed load ranging from 0-3/8 kilopond (0-18.75 watts) over a period of eight months. In both exercise studies the same work was not achieved by each paraplegic. FES was regulated by a closed loop system which is not presently commercially available, the frequency of the sequential muscle stimulator was 40 Hz with a pulse width of 300 us. Quadriceps muscle area of both legs increased 62.7% (p<0.01) after anaerobic exercise; similar but less pronounced effects followed aerobic exercise. Histologically two distinct patterns were noted from the outset, one had normal fibre type distribution the remainder had marked Type 1 loss. Both exercise regimens failed to change these although the number of internal nuclei per 100 fibres steadily increased (from 7.0% to 13.8% to 26.0%) as did the % of fibres with internal nuclei (5.4% to 10.5% to 25.7%) throughout the exercise periods. The significance of these observations is not immediately apparent but may signify continuing damage which may be due to the eccentric rather than the concentric nature of FES promoted muscular contraction.


Author(s):  
Marco Laubacher ◽  
Efe Anil Aksöz ◽  
Ines Bersch ◽  
Kenneth James Hunt

Functional electrical stimulation (FES) provides a good possibility to activate paralysed muscles and it has been shown to elicit substantial physiological and health benefits. For successful application of FES, a perfect symbiosis of the bike and the pilot has to be achieved. The road to the Cybathlon 2016 describes the different pieces needed for FES cycling in spinal cord injury. The systematic optimisation of the stimulation parameters and the Cybatrike, and sophisticated training contributed to the team’s success as the fastest surface-electrode team in the competition.


Sign in / Sign up

Export Citation Format

Share Document