©THESTAR EXAM SOLUTIONS 2024/2025
ALL RIGHTS RESERVED.
ABC Prosthetic Exam Questions With
Verified Answers
The gluteus medium is most active during what phase of stance? - Answers✔Midstance
Which of the following is a major cause of the toe externally rotating at heel strike for an AK?
A)knee bolt externally rotated. B)excessive toe out. C)keel too short. D) plantar flexion
resistance is too firm? - Answers✔D) plantarflexion resistance is too firm
All of the following factors contribute to vaulting with an AK except? A) weak hip extensors.
B)prosthesis too long. C) excessive knee friction. D)inadequate suspension? - Answers✔A) weak
hip extensors
The gait cycle consists of? - Answers✔Heel strike on one side to the following heel strike on the
same side.
Venous return of the blood to the heart is assisted by? - Answers✔The action of skeletal muscles
How many inches does the center of gravity shift from side to side during normal locomotion? -
Answers✔2 inches
Your center of gravity is located where? - Answers✔Just anterior of the second sacral vertebrae.
The surgical attachment of muscle to muscle - Answers✔Myoplasty
The surgical attachment of muscle to bone - Answers✔Myodesis
The body's center of gravity reaches its highest point at? - Answers✔midstance
Pressure is determined by (equation) - Answers✔Force divided by area
During normal human locomotion, between heel contact and foot flat, GRF causes which
moment at the knee and hip? - Answers✔Knee flexion and hip flexion
If the sciatic nerve is severed at the level of the lesser trochanter, muscle function will not be
impaired at which lower extremity joint? - Answers✔The hip joint
In a shoulder disartic, what muscles would be most suitable sites for control of a myoelectric
elbow? - Answers✔Pectoralis major and the trapezius
, ©THESTAR EXAM SOLUTIONS 2024/2025
ALL RIGHTS RESERVED.
In a scapulothoracic amputee, what motion can be used to operate the prosthesis? -
Answers✔Chest expansion
The infraspinatus performs what action? - Answers✔external rotation of the arm, stabilize the
shoulder
The terminal device on a shoulder disartic is operated primarily by scapular...? -
Answers✔Scapular abduction
Shoulder district tend to have more difficulty with force or excursion? - Answers✔Excursion
needed to operate the prosthesis.
The most prominent and superior point of the shoulder girdle is the? - Answers✔Acromion
Benefits of a shoulder saddle harness? - Answers✔Increase comfort in axial loading, reduce
pressure on the axilla (however does not improve excursion with biscapular abduction)
What UE amputation level are external or outside locking joints designed for? - Answers✔Elbow
disarticulation or distal humerus (when a standard elbow unit would otherwise excessively
elongate the humeral section)
Standard length of a prosthetic elbow unit - Answers✔2"
Definition of amelia - Answers✔complete absence of a limb
Where should the cross point of a Figure 8 harness be located? - Answers✔Inferior of C7 and
towards the sound side.
What epiphysis contributes most to the longitudinal growth of the UE? - Answers✔the distal
humerus
Action: Elevation of the scapula - Answers✔Muscle: Trapezius
What action at the shoulder will be impaired if the middle deltoid is not functional? -
Answers✔Abduction
What amputation level would flexible elbow hinges be most appropriate? - Answers✔Long
transradial and lower (some pronation and supination)
Extended proximal trimlines serve what purpose in and short TH prosthesis? -
Answers✔increase rotational stability
The muscles the pass posterior to the medial malleoli act to: - Answers✔Invert and plantarflex
the foot. Include: posterior tibias, flexor digitorum longs, flexor hallucis longus.
ALL RIGHTS RESERVED.
ABC Prosthetic Exam Questions With
Verified Answers
The gluteus medium is most active during what phase of stance? - Answers✔Midstance
Which of the following is a major cause of the toe externally rotating at heel strike for an AK?
A)knee bolt externally rotated. B)excessive toe out. C)keel too short. D) plantar flexion
resistance is too firm? - Answers✔D) plantarflexion resistance is too firm
All of the following factors contribute to vaulting with an AK except? A) weak hip extensors.
B)prosthesis too long. C) excessive knee friction. D)inadequate suspension? - Answers✔A) weak
hip extensors
The gait cycle consists of? - Answers✔Heel strike on one side to the following heel strike on the
same side.
Venous return of the blood to the heart is assisted by? - Answers✔The action of skeletal muscles
How many inches does the center of gravity shift from side to side during normal locomotion? -
Answers✔2 inches
Your center of gravity is located where? - Answers✔Just anterior of the second sacral vertebrae.
The surgical attachment of muscle to muscle - Answers✔Myoplasty
The surgical attachment of muscle to bone - Answers✔Myodesis
The body's center of gravity reaches its highest point at? - Answers✔midstance
Pressure is determined by (equation) - Answers✔Force divided by area
During normal human locomotion, between heel contact and foot flat, GRF causes which
moment at the knee and hip? - Answers✔Knee flexion and hip flexion
If the sciatic nerve is severed at the level of the lesser trochanter, muscle function will not be
impaired at which lower extremity joint? - Answers✔The hip joint
In a shoulder disartic, what muscles would be most suitable sites for control of a myoelectric
elbow? - Answers✔Pectoralis major and the trapezius
, ©THESTAR EXAM SOLUTIONS 2024/2025
ALL RIGHTS RESERVED.
In a scapulothoracic amputee, what motion can be used to operate the prosthesis? -
Answers✔Chest expansion
The infraspinatus performs what action? - Answers✔external rotation of the arm, stabilize the
shoulder
The terminal device on a shoulder disartic is operated primarily by scapular...? -
Answers✔Scapular abduction
Shoulder district tend to have more difficulty with force or excursion? - Answers✔Excursion
needed to operate the prosthesis.
The most prominent and superior point of the shoulder girdle is the? - Answers✔Acromion
Benefits of a shoulder saddle harness? - Answers✔Increase comfort in axial loading, reduce
pressure on the axilla (however does not improve excursion with biscapular abduction)
What UE amputation level are external or outside locking joints designed for? - Answers✔Elbow
disarticulation or distal humerus (when a standard elbow unit would otherwise excessively
elongate the humeral section)
Standard length of a prosthetic elbow unit - Answers✔2"
Definition of amelia - Answers✔complete absence of a limb
Where should the cross point of a Figure 8 harness be located? - Answers✔Inferior of C7 and
towards the sound side.
What epiphysis contributes most to the longitudinal growth of the UE? - Answers✔the distal
humerus
Action: Elevation of the scapula - Answers✔Muscle: Trapezius
What action at the shoulder will be impaired if the middle deltoid is not functional? -
Answers✔Abduction
What amputation level would flexible elbow hinges be most appropriate? - Answers✔Long
transradial and lower (some pronation and supination)
Extended proximal trimlines serve what purpose in and short TH prosthesis? -
Answers✔increase rotational stability
The muscles the pass posterior to the medial malleoli act to: - Answers✔Invert and plantarflex
the foot. Include: posterior tibias, flexor digitorum longs, flexor hallucis longus.
