CPO CPO Biomechanics & Gait Analysis 3

Question 1

In orthotic management, 'ground reaction AFO' (GRAFO) works primarily by:

Accepted Answer

Applying a GRF-induced extension moment to the knee via a rigid anterior shell

Answer

Blocking ankle plantarflexion mechanically

Answer

Supporting the arch with a medial wedge

Answer

Limiting subtalar inversion

Question 2

Which gait parameter directly measures the distance from one heel strike to the next heel strike of the SAME foot?

Accepted Answer

Stride length

Answer

Step length

Answer

Step width

Answer

Cadence

Question 3

Excessive lumbar lordosis observed during prosthetic ambulation with a transfemoral amputee is most likely caused by:

Accepted Answer

Hip flexion contracture on the residual limb side

Answer

Excessive prosthetic knee flexion

Answer

Weak ankle musculature

Answer

Tight IT band on sound limb

Question 4

The 'Otto Bock alignment system' and similar dynamic alignment methods assess prosthetic socket position primarily by evaluating:

Accepted Answer

Ground reaction force vector relative to joint centers during walking

Answer

Static weight distribution in parallel bars

Answer

Socket fit via palpation of residual limb

Answer

Cosmetic appearance from the frontal view

Question 5

Which clinical gait analysis tool provides the most comprehensive and objective biomechanical data for complex prosthetic and orthotic cases?

Accepted Answer

Instrumented 3D motion capture with force plates

Answer

Observational gait analysis (OGA)

Answer

Videotaped gait analysis

Answer

Timed Up and Go (TUG) test

Question 6

Which force is primarily responsible for propulsion during terminal stance (push-off) in normal gait?

Accepted Answer

Plantarflexor moment from gastrocnemius and soleus

Answer

Hip extensor moment

Answer

Anterior shear ground reaction force

Answer

Quadriceps eccentric contraction