CPO CPO Biomechanics & Gait Analysis 2

Question 1

Which orthotic alignment principle ensures the knee joint center is positioned anterior to the ground reaction force vector during stance to promote stability?

Accepted Answer

Passive knee stability through GRF anterior to joint

Answer

Dynamic alignment

Answer

Active quadriceps recruitment

Answer

Posterior socket trim lines

Question 2

A transfemoral amputee demonstrates lateral trunk bending toward the prosthetic side during stance. Which prosthetic cause should be investigated first?

Accepted Answer

Prosthetic limb too short

Answer

Prosthetic limb too long

Answer

Excessive socket adduction

Answer

Soft prosthetic foot

Question 3

What does cadence refer to in clinical gait analysis?

Accepted Answer

Number of steps taken per unit time

Answer

Distance covered per step

Answer

Speed of swing phase

Answer

Ratio of stance to swing time

Question 4

During KAFO fitting, which biomechanical factor most influences the decision to set the knee joint in slight flexion rather than full extension?

Accepted Answer

Reducing energy expenditure during ambulation

Answer

Cosmesis preference

Answer

Improving quadriceps function

Answer

Decreasing lumbar lordosis

Question 5

Which parameter best describes the symmetry of a prosthetic user's gait and is frequently used to compare stance time between limbs?

Accepted Answer

Symmetry index (SI)

Answer

Step width

Answer

Treadmill velocity

Answer

Pelvic obliquity angle

Question 6

Which prosthetic foot category is specifically designed to store and return energy during push-off, improving ambulatory efficiency?

Accepted Answer

Energy-storing-and-return (ESAR) foot

Answer

SACH foot

Answer

Single-axis foot

Answer

Multi-axial foot