TT Gait Deviations Flashcards
What are prosthetic causes of excessive knee extension during IC->Mst?
- Socket aligned to far posterior or foot too far anterior
- Heel too soft
- Insufficient socket flexion
What are user causes of excessive knee extension during IC->Mst?
- Weak musculature around the knee
2. Locking knee in extension for stability because of fear
Excessive knee extension causes what type of moment at the knee?
Knee extensor moment
Where would you see skin break down with excessive knee extension?
Skin break down on anterior distal tibia from extending excessively in socket (bell clapping)
What are prosthetic causes of knee instability during IC->LR?
- Socket aligned too far anterior/foot aligned too far posterior
- Heel too firm
- Excessive foot DF
What are user causes of excessive knee extension during IC->LR?
- Weak quads
2. Knee flexion contracture
Where would you see skin break down/pressure with knee instability?
Unstable/pressure at posterior distal residual limb
Knee instability of TT gait will effect stance phase on prosthetic in what way?
Shortened during stance
Describe hip drop during Mst on prosthetic:
pelvic drop toward prosthetic side during Mst (best seen in frontal plane)
What are prosthetic causes of hip drop during Mst on prosthetic?
Prosthesis too short
What are user causes of hip drop during Mst on prosthetic?
Residual limb pain
What occurs with a narrow-based gait (lateral thrust)?
narrow BOS with lateral thrust of socket during Mst, excessive varus thrust at knee (frontal plane)
What are prosthetic causes of lateral thrust during Mst?
Foot too far inset
Laterally leaning pylon
What are user causes of lateral thrust during Mst?
Glute med weakness
Knee Ligament insufficiency
During lateral thrust during Mst where will you see increased pressure?
Proximal medial and distal lateral