Abstract
The force-velocity and length-tension properties of electrically stimulated quadriceps muscles were determined in a pilot study with two teenage subjects with midthoracic spinal cord injuries. Percutaneous intramuscular electrodes were used to elicit maximal isometric and concentric isokinetic contractions over angles range from 20° to 80° of knee flexion and over speeds from 30° to 150° per second. Submaximal contractions were generated both eccentrically and concentrically. Maximal concentric moment-velocity-angle surfaces were found to be similar in all respects to force-velocity-length surfaces reported for isolated animal preparations. Submaximal profiles grossly approximated the characteristics of maximal contractions. For any joint angle, eccentric moments were generally greater than those produced isometrically or concentrically.
| Original language | English |
|---|---|
| Pages (from-to) | 967-968 |
| Number of pages | 2 |
| Journal | Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings |
| Volume | 11 pt 3 |
| State | Published - Nov 1989 |
| Externally published | Yes |
| Event | Images of the Twenty-First Century - Proceedings of the 11th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Part 1 - Seattle, WA, USA Duration: 9 Nov 1989 → 12 Nov 1989 |