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ABC Prosthetic exam Questions and Answers
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Exam of 10 pages for the course Prosthetic written at Prosthetic written (ABC Prosthetic exam)
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ABC Prosthetic examThe gluteus medium is most active during what phase of stance? - answer 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? - answerD) 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?
- answerA) weak hip extensors
The gait cycle consists of? - answerHeel strike on one side to the following heel strike
on the same side.
Venous return of the blood to the heart is assisted by? - answerThe action of skeletal
muscles
How many inches does the center of gravity shift from side to side during normal
locomotion? - answer2 inches
Your center of gravity is located where? - answerJust anterior of the second sacral
vertebrae.
The surgical attachment of muscle to muscle - answerMyoplasty
The surgical attachment of muscle to bone - answerMyodesis
The body's center of gravity reaches its highest point at? - answermidstance
Pressure is determined by (equation) - answerForce divided by area
During normal human locomotion, between heel contact and foot flat, GRF causes
which moment at the knee and hip? - answerKnee 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? - answerThe hip joint
In a shoulder disartic, what muscles would be most suitable sites for control of a
myoelectric elbow? - answerPectoralis major and the trapezius
, In a scapulothoracic amputee, what motion can be used to operate the prosthesis? -
answerChest expansion
The infraspinatus performs what action? - answerexternal rotation of the arm, stabilize
the shoulder
The terminal device on a shoulder disartic is operated primarily by scapular...? -
answerScapular abduction
Shoulder district tend to have more difficulty with force or excursion? - answerExcursion
needed to operate the prosthesis.
The most prominent and superior point of the shoulder girdle is the? - answerAcromion
Benefits of a shoulder saddle harness? - answerIncrease 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? -
answerElbow disarticulation or distal humerus (when a standard elbow unit would
otherwise excessively elongate the humeral section)
Standard length of a prosthetic elbow unit - answer2"
Definition of amelia - answercomplete absence of a limb
Where should the cross point of a Figure 8 harness be located? - answerInferior of C7
and towards the sound side.
What epiphysis contributes most to the longitudinal growth of the UE? - answerthe distal
humerus
Action: Elevation of the scapula - answerMuscle: Trapezius
What action at the shoulder will be impaired if the middle deltoid is not functional? -
answerAbduction
What amputation level would flexible elbow hinges be most appropriate? - answerLong
transradial and lower (some pronation and supination)
Extended proximal trimlines serve what purpose in and short TH prosthesis? -
answerincrease rotational stability
The muscles the pass posterior to the medial malleoli act to: - answerInvert and
plantarflex the foot. Include: posterior tibias, flexor digitorum longs, flexor hallucis
longus.
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