CPT Anatomy & Physiology Fundamentals 3

Question 1

Which type of joint allows the greatest range of motion and is most commonly affected by conditions requiring lower-limb prosthetics?

Accepted Answer

Synovial joint

Answer

Synovial joints provide the greatest range of motion and include joints like the hip and knee that are central to prosthetic gait.

Question 2

The ischial tuberosity is a critical loading point in ischial containment sockets. To which bone does this structure belong?

Accepted Answer

Ischium

Answer

The ischial tuberosity is the roughened inferior projection of the ischium and bears body weight during sitting.

Question 3

Which physiological process causes post-amputation edema in the residual limb, and understanding it helps technicians recommend appropriate sock ply management?

Accepted Answer

Disrupted lymphatic drainage

Answer

Amputation disrupts lymphatic vessels, impairing fluid drainage and causing edema that the prosthetic socket must accommodate.

Question 4

A residual limb shows a scar over a bony prominence. Which anatomical principle explains why this area is at highest risk for skin breakdown?

Accepted Answer

Reduced tissue compressibility over bony prominences

Answer

Tissue over bony prominences has less compressibility, concentrating interface pressure and increasing skin breakdown risk.

Question 5

Which of the following muscles, when spastic or contracted in a transtibial amputee, most commonly causes a knee flexion contracture?

Accepted Answer

Hamstrings

Answer

Hamstring spasticity or contracture causes persistent knee flexion, complicating transtibial prosthetic alignment.

(CPT) Certified Prosthetic Technician Practice Test

(CPT) Certified Prosthetic Technician Practice Test

CPT Anatomy & Physiology Fundamentals 3