CPO Biomechanics & Gait Analysis Flashcards
6 cards from real CPO practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CPO Biomechanics & Gait Analysis flashcards as text
In orthotic management, 'ground reaction AFO' (GRAFO) works primarily by:
Answer: Applying a GRF-induced extension moment to the knee via a rigid anterior shell
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.
Which gait parameter directly measures the distance from one heel strike to the next heel strike of the SAME foot?
Answer: Stride length
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.
Excessive lumbar lordosis observed during prosthetic ambulation with a transfemoral amputee is most likely caused by:
Answer: Hip flexion contracture on the residual limb side
A hip flexion contracture on the residual limb side prevents full hip extension, causing anterior pelvic tilt and compensatory lumbar lordosis during stance.
The 'Otto Bock alignment system' and similar dynamic alignment methods assess prosthetic socket position primarily by evaluating:
Answer: Ground reaction force vector relative to joint centers during walking
Dynamic alignment methods assess the ground reaction force vector relative to prosthetic joint centers during walking to optimize stability and function.
Which clinical gait analysis tool provides the most comprehensive and objective biomechanical data for complex prosthetic and orthotic cases?
Answer: Instrumented 3D motion capture with force plates
Instrumented 3D motion capture combined with force plates provides quantitative kinematic and kinetic data across all planes, enabling detailed biomechanical analysis.
Which force is primarily responsible for propulsion during terminal stance (push-off) in normal gait?
Answer: Plantarflexor moment from gastrocnemius and soleus
The plantarflexors (gastrocnemius and soleus) generate the primary propulsive push-off force during terminal stance by creating a large plantarflexor moment.
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