Pathology vs Healthy

• Amputee - Horizontal Component:

  • 2 steps
  • From non-amputee to amputee limb
• Non-Amputee Limb pt 1:

  • Peak of initial F4 component would expect 0.2 x BM, this is 0.1 or 0.05 x BM, much lower
  • Healthy limb is lower because the propulsion of amputee side is weak
  • Braking force on healthy side significantly reduced from prior step
• Non-Amputee Limb pt 2:

  • Propulsion force is less than 1 x BM would expect it to be higher 1.2 x BM, so have lower braking force on next limb
  • When healthy force propels to 1.3 BM = stronger push than expected making up for weaker amputee side
  • See kind of gallop, esp as speed up
  • Amount of time on amputee limb amount of time at 0 is extended (longer), before move into propulsive
  • Don’t move out of 0 until around 60% of stance phase