Gait Knee » History » Version 2
Sæþór Ólafur Pétursson, 2012-01-18 17:57
Put some extra comments
| 1 | 1 | Árni Þorvaldsson | h1. Gait Knee |
|---|---|---|---|
| 2 | |||
| 3 | |||
| 4 | |||
| 5 | *stance phase* 60% |
||
| 6 | flexion-extension-flexion |
||
| 7 | |||
| 8 | *swing phase* 40% |
||
| 9 | extension |
||
| 10 | |||
| 11 | |||
| 12 | |||
| 13 | *initial contact* |
||
| 14 | 2 | Sæþór Ólafur Pétursson | extension (-2 to 5°flexion) |
| 15 | -The knee can be hyperextended to -2° |
||
| 16 | •This means that the knee has to have a convertible knee joint wich can variate from 4° to -2° |
||
| 17 | 1 | Árni Þorvaldsson | |
| 18 | by keeping knee extended we keep stability |
||
| 19 | |||
| 20 | *loading response* |
||
| 21 | flexion (15°) |
||
| 22 | shock absorption |
||
| 23 | 2 | Sæþór Ólafur Pétursson | -The center of gravity changes. The weight is changed to the leg which the individual is going to use. |
| 24 | •The knee need to handle the weight so the knee does not collapse. |
||
| 25 | 1 | Árni Þorvaldsson | |
| 26 | *mid stance* |
||
| 27 | 5°increased flexion, then extends to 12°flexion |
||
| 28 | to keep stability |
||
| 29 | |||
| 30 | *terminal stance* |
||
| 31 | completion of extension, then flexion starts again at the end. |
||
| 32 | |||
| 33 | *pre swing* |
||
| 34 | flexion(up to 40°) |
||
| 35 | to prepare for the swing |
||
| 36 | 2 | Sæþór Ólafur Pétursson | |
| 37 | 1 | Árni Þorvaldsson | |
| 38 | *swing* |
||
| 39 | extension |
||
| 40 | |||
| 41 | |||
| 42 | |||
| 43 | |||
| 44 | people with prostetics have more knee flexion |
||
| 45 | |||
| 46 | *implementation* |
||
| 47 | simple hince joint. |
||
| 48 | |||
| 49 | rotation in knee |
||
| 50 | there has to be some rotation in the knee, otherwise it would be torque in the joint. |
||
| 51 | easiest to have the rotation below the knee |