ABC Prosthetic exam 2023 questions and answers
complete
The gluteus medium is most active during what phase of stance?
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?
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?
A) weak hip extensors
The gait cycle consists of?
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?
The action of skeletal muscles
How many inches does the center of gravity shift from side to side during normal
locomotion?
2 inches
Your center of gravity is located where?
Just anterior of the second sacral vertebrae.
The surgical attachment of muscle to muscle
Myoplasty
The surgical attachment of muscle to bone
Myodesis
The body's center of gravity reaches its highest point at?
midstance
Pressure is determined by (equation)
Force divided by area
During normal human locomotion, between heel contact and foot flat, GRF
causes which moment at the knee and hip?
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?
The hip joint
In a shoulder disartic, what muscles would be most suitable sites for control of a
myoelectric elbow?
Pectoralis major and the trapezius
In a scapulothoracic amputee, what motion can be used to operate the
prosthesis?
Chest expansion
The infraspinatus performs what action?
external rotation of the arm, stabilize the shoulder
The terminal device on a shoulder disartic is operated primarily by scapular...?
, Scapular abduction
Shoulder district tend to have more difficulty with force or excursion?
Excursion needed to operate the prosthesis.
The most prominent and superior point of the shoulder girdle is the?
Acromion
Benefits of a shoulder saddle harness?
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?
Elbow disarticulation or distal humerus (when a standard elbow unit would otherwise
excessively elongate the humeral section)
Standard length of a prosthetic elbow unit
2"
Definition of amelia
complete absence of a limb
Where should the cross point of a Figure 8 harness be located?
Inferior of C7 and towards the sound side.
What epiphysis contributes most to the longitudinal growth of the UE?
the distal humerus
Action: Elevation of the scapula
Muscle: Trapezius
What action at the shoulder will be impaired if the middle deltoid is not
functional?
Abduction
What amputation level would flexible elbow hinges be most appropriate?
Long transradial and lower (some pronation and supination)
Extended proximal trimlines serve what purpose in and short TH prosthesis?
increase rotational stability
The muscles the pass posterior to the medial malleoli act to:
Invert and plantarflex the foot. Include: posterior tibias, flexor digitorum longs, flexor
hallucis longus.
Primary flexors of the knee include:
The hamstrings: biceps femoris (insert lateral), semitendinosus, semimembranosus
(insert most medial).
The selisian bandage/belt provides?
aides in rotational control, improves suspension (often paired with suction), provides
additional sense of security. Does not provide M/L stability.
How to determine the M/L dimension for a quad socket.
divide thigh circumference at ischial level by three.
In normal gait, the hip reaches maximum extension at what phase?
Heel off
SACH foot advantages
soft heel simulates plantarflexion, low weight, low cost, low maintenence, shock
absorbing
SACH foot disadvantages (Solid Ankle Cushioned Heel)
complete
The gluteus medium is most active during what phase of stance?
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?
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?
A) weak hip extensors
The gait cycle consists of?
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?
The action of skeletal muscles
How many inches does the center of gravity shift from side to side during normal
locomotion?
2 inches
Your center of gravity is located where?
Just anterior of the second sacral vertebrae.
The surgical attachment of muscle to muscle
Myoplasty
The surgical attachment of muscle to bone
Myodesis
The body's center of gravity reaches its highest point at?
midstance
Pressure is determined by (equation)
Force divided by area
During normal human locomotion, between heel contact and foot flat, GRF
causes which moment at the knee and hip?
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?
The hip joint
In a shoulder disartic, what muscles would be most suitable sites for control of a
myoelectric elbow?
Pectoralis major and the trapezius
In a scapulothoracic amputee, what motion can be used to operate the
prosthesis?
Chest expansion
The infraspinatus performs what action?
external rotation of the arm, stabilize the shoulder
The terminal device on a shoulder disartic is operated primarily by scapular...?
, Scapular abduction
Shoulder district tend to have more difficulty with force or excursion?
Excursion needed to operate the prosthesis.
The most prominent and superior point of the shoulder girdle is the?
Acromion
Benefits of a shoulder saddle harness?
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?
Elbow disarticulation or distal humerus (when a standard elbow unit would otherwise
excessively elongate the humeral section)
Standard length of a prosthetic elbow unit
2"
Definition of amelia
complete absence of a limb
Where should the cross point of a Figure 8 harness be located?
Inferior of C7 and towards the sound side.
What epiphysis contributes most to the longitudinal growth of the UE?
the distal humerus
Action: Elevation of the scapula
Muscle: Trapezius
What action at the shoulder will be impaired if the middle deltoid is not
functional?
Abduction
What amputation level would flexible elbow hinges be most appropriate?
Long transradial and lower (some pronation and supination)
Extended proximal trimlines serve what purpose in and short TH prosthesis?
increase rotational stability
The muscles the pass posterior to the medial malleoli act to:
Invert and plantarflex the foot. Include: posterior tibias, flexor digitorum longs, flexor
hallucis longus.
Primary flexors of the knee include:
The hamstrings: biceps femoris (insert lateral), semitendinosus, semimembranosus
(insert most medial).
The selisian bandage/belt provides?
aides in rotational control, improves suspension (often paired with suction), provides
additional sense of security. Does not provide M/L stability.
How to determine the M/L dimension for a quad socket.
divide thigh circumference at ischial level by three.
In normal gait, the hip reaches maximum extension at what phase?
Heel off
SACH foot advantages
soft heel simulates plantarflexion, low weight, low cost, low maintenence, shock
absorbing
SACH foot disadvantages (Solid Ankle Cushioned Heel)
