Page 1 of 129
Rosthetic Written Exam Part 1 AK & BK
Prosthetics, Alignment, Gait, Biomechanics |
Rehabilitation - Questions with Correct
Answers & Explanations | Graded A+ Study
Guide.
Q1. The primary weight-bearing area of a transtibial (BK)
residual limb is:
A) The fibular head
B) The tibial plateau and patellar tendon
C) The distal tibia
D) The medial hamstrings
Answer: B
Rationale: In a transtibial socket, weight is borne on the patellar
tendon, tibial plateau (medial and lateral), and the popliteal
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fossa (when using a PTB design). Distal end is non-weight-
bearing.
Q2. Which muscle group is most critical for knee extension in a
transfemoral (AK) amputee during stance phase?
A) Hip flexors
B) Hip extensors (gluteus maximus)
C) Quadriceps (residual)
D) Hamstrings
Answer: B
Rationale: The gluteus maximus is the primary hip extensor and
is critical for stabilizing the knee during stance phase by
preventing knee flexion. In a transfemoral amputee, the
prosthetic knee must resist flexion, but the hip extensors control
the proximal segment.
Q3. The anatomical "adductor tubercle" is important in
transfemoral prosthetics because:
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A) It is the primary weight-bearing area
B) It serves as a reference for socket mediolateral stability and
narrowing (ischial containment)
C) It attaches the patellar tendon
D) It is where the suspension sleeve attaches
Answer: B
Rationale: In ischial containment sockets (e.g., CAT-CAM), the
adductor tubercle and ramus are used to contain the ischium and
provide mediolateral stability, preventing abduction/adduction
moments.
Q4. The longest bone in the human body is the:
A) Tibia
B) Fibula
C) Femur
D) Humerus
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Answer: C
Rationale: The femur is the longest and strongest bone. In a
transfemoral amputation, the remaining femoral length
significantly affects lever arm and function.
Q5. During normal gait, the knee flexes to approximately how
many degrees at initial swing?
A) 20°
B) 40°
C) 60°
D) 80°
Answer: C
Rationale: Knee flexion during swing phase reaches
approximately 60-65° to achieve foot clearance. This is critical
for prosthetic knee selection (e.g., swing phase control).
Q6. The "tibial tuberosity" is an important landmark for a
transtibial socket because:
Rosthetic Written Exam Part 1 AK & BK
Prosthetics, Alignment, Gait, Biomechanics |
Rehabilitation - Questions with Correct
Answers & Explanations | Graded A+ Study
Guide.
Q1. The primary weight-bearing area of a transtibial (BK)
residual limb is:
A) The fibular head
B) The tibial plateau and patellar tendon
C) The distal tibia
D) The medial hamstrings
Answer: B
Rationale: In a transtibial socket, weight is borne on the patellar
tendon, tibial plateau (medial and lateral), and the popliteal
,Page 2 of 129
fossa (when using a PTB design). Distal end is non-weight-
bearing.
Q2. Which muscle group is most critical for knee extension in a
transfemoral (AK) amputee during stance phase?
A) Hip flexors
B) Hip extensors (gluteus maximus)
C) Quadriceps (residual)
D) Hamstrings
Answer: B
Rationale: The gluteus maximus is the primary hip extensor and
is critical for stabilizing the knee during stance phase by
preventing knee flexion. In a transfemoral amputee, the
prosthetic knee must resist flexion, but the hip extensors control
the proximal segment.
Q3. The anatomical "adductor tubercle" is important in
transfemoral prosthetics because:
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A) It is the primary weight-bearing area
B) It serves as a reference for socket mediolateral stability and
narrowing (ischial containment)
C) It attaches the patellar tendon
D) It is where the suspension sleeve attaches
Answer: B
Rationale: In ischial containment sockets (e.g., CAT-CAM), the
adductor tubercle and ramus are used to contain the ischium and
provide mediolateral stability, preventing abduction/adduction
moments.
Q4. The longest bone in the human body is the:
A) Tibia
B) Fibula
C) Femur
D) Humerus
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Answer: C
Rationale: The femur is the longest and strongest bone. In a
transfemoral amputation, the remaining femoral length
significantly affects lever arm and function.
Q5. During normal gait, the knee flexes to approximately how
many degrees at initial swing?
A) 20°
B) 40°
C) 60°
D) 80°
Answer: C
Rationale: Knee flexion during swing phase reaches
approximately 60-65° to achieve foot clearance. This is critical
for prosthetic knee selection (e.g., swing phase control).
Q6. The "tibial tuberosity" is an important landmark for a
transtibial socket because:
