Pathologic Gait and Orthotics Quiz

What effect does a slightly flexed knee have on body weight vector during gait?

• It causes the body weight vector to fall anterior to the knee and posterior to the hip.

• It has no effect on the body weight vector.

• It causes the body weight vector to fall posterior to the knee, anterior to the hip, and through the ankle.

• It causes the body weight vector to fall anterior to the knee, posterior to the hip, and posterior to the ankle

What is true about the position of the shank and thigh during a normal gait cycle?

• The shank and thigh are always vertical at the same time.

• The shank is vertical at midstance, but the thigh is not.

• Both the shank and thigh are inclined at midstance.

• The thigh is vertical at midstance, but the shank is not.

What is the role of the plantarflexors during the gait cycle?

• It accelerates the forward progression of the shank.

• It has no significant role during the gait cycle.

• It slows the forward progression of the shank to achieve knee extension.

• It stabilizes the ankle only.

How does the ground reaction force affect the hip and knee during MIDSTANCE to TERMINAL STANCE?

• It decreases the extension moment at both the hip and knee.

• It creates an extension moment at the hip and knee.

• It has no effect on the hip and knee.

• It creates a flexion moment at the hip and knee.

What is the role of the heel rocker during the stance phase of gait?

• To provide initial contact to loading response

• To assist in midstance to terminal stance

• To act as a secondary shock absorber

• To stabilize the tibia

During which phase does the ankle rocker (2nd rocker) primarily function?

• Initial contact to loading response

• Loading response to midstance

• Midstance to terminal stance

• Terminal stance to initial contact

Answer explanation

1.     Heel rocker: initial contact to loading response (flat foot)

2.     Ankle rocker: loading response to midstance

3.     Forefoot rocker: midstance to terminal stance (heel lift)

What is the role of the knee during the stance phase of gait?

• To provide initial contact

• To act as a primary shock absorber

• To act as a secondary shock absorber

• To stabilize the foot during terminal stance

Answer explanation

ankle is primary shock absorber?

Which group of muscles is primarily active during the mid and terminal stance phases at the ankle?

• Quadriceps

• Hamstrings

• Plantar flexors

• Tibialis anterior

What function does an Ankle-Foot Orthosis (AFO) NOT provide for drop-foot?

• Preventing foot-slap

• Preserving the heel rocker

• Improving push-off (third rocker) function

• Inhibiting drop-foot in swing phase

Which characteristic is associated with a slow-extended walker post-stroke?

• Weakness in plantar flexors only

• Hip hike and circumduction for foot clearance

• Strong knee extensors during stance

• Reduced hip flexion in mid-stance