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

A GRAFO uses a rigid anterior tibial shell to redirect the ground reaction force anterior to the knee, creating an extension moment that supports weak quadriceps.

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

Stride length is the linear distance covered from one heel strike of a given foot to the next heel strike of the same foot, representing one complete gait cycle.

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

A hip flexion contracture on the residual limb side prevents full hip extension, causing anterior pelvic tilt and compensatory lumbar lordosis during stance.

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

Dynamic alignment methods assess the ground reaction force vector relative to prosthetic joint centers during walking to optimize stability and function.

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

Instrumented 3D motion capture combined with force plates provides quantitative kinematic and kinetic data across all planes, enabling detailed biomechanical analysis.

(CPO) Certified Prosthetist Orthotist Practice Test

(CPO) Certified Prosthetist Orthotist Practice Test

CPO CPO Biomechanics & Gait Analysis 3