Gait Deviations

Question 1

What does the foot being displaced medial cause

Answer 1

Pushes knee into varus (more lateral thrust)

Question 2

What does the foot being displaced lateral cause

Answer 2

Pushes knee into valgus

Question 3

What does posterior displacement of the foot cause

Answer 3

DF and knee flexion

Question 4

What does anterior displacement of the foot cause

Answer 4

PF and hyperextension

Question 5

What causes the knee to remain extended (5)

Answer 5

1. Foot too anterior
2. Foot too plantarflexed
3. Heel cushion too soft
4. Heel on shoe too low
5. Excessive use of knee extensors or weak quadriceps

Question 6

What causes excessive knee flexion (6)

Answer 6

1. Foot too posterior
2. Foot too dorsiflexed
3. Heel on shoe too high
4. Heel cushion too firm
5. Increased pressure against anterodistal tibia
6. Weak knee extensors resulting in flexion that is not smooth

Question 7

What causes early knee flexion (4)

Answer 7

1. Excessive posterior displacement of the foot in relation to the socket
2. Excessive dorsiflexion
3. Prosthetic foot keel is too short
4. Excessive socket flexion (may occur with a resolving knee flexion contracture)

Question 8

What causes delayed knee flexion (2)

Answer 8

1. Foot too anterior

2. Foot too plantarflexed

Question 9

What causes a foot whip (2)

Answer 9

1. Suspension cuff not aligned evenly

2. Prosthesis is rotated

Question 10

What motion causes a medial whip

Answer 10

ER of the knee

Question 11

What motion causes a lateral whip

Answer 11

IR of the knee

Question 12

What whip is most common

Answer 12

Medial

Question 13

How do you determine the whip

Answer 13

How the heel is positioned (if medial or lateral)

Question 14

What causes pistoning of the residual limb in the socket (4)

Answer 14

1. Suspension inadequate
2. Not enough prosthetic socks
3. Prosthesis has been put on incorrectly
4. Patient has lost weight