Abstract
To assess the contribution of periarticular tissue afferents to knee joint varus/valgus stiffness we applied an abducting positional deflection to the fully extended knee using a servomotor and recorded the torque response using a six degree-of-freedom load-cell. EMG activity in pre-activated quadriceps and hamstrings muscles were also recorded with surface electrodes. A simple linear second order delayed model was used to describe the knee joint dynamics in the medial/lateral direction. Our results revealed that periarticular tissue reflexes resulted in a significant increase of the joint's varus-valgus stiffness. In contrast to stretch reflex action, which is modulated with background force, the periarticular tissue reflexes showed modest dependence on muscle force.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1460-1463 |
| Number of pages | 4 |
| Journal | Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings |
| Volume | 2 |
| State | Published - 2003 |
| Externally published | Yes |
| Event | A New Beginning for Human Health: Proceddings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society - Cancun, Mexico Duration: Sep 17 2003 → Sep 21 2003 |
Keywords
- Joint Stiffness
- Passive Tissue Afferents
- Varus/Valgus
ASJC Scopus subject areas
- Signal Processing
- Biomedical Engineering
- Computer Vision and Pattern Recognition
- Health Informatics