Random: Mock Prosthetic Written Exam #1 With Correct Answers

All of the following factors contribute to vaulting with a TF prosthesis EXCEPT: A. Prosthesis too long B. Excessive knee friction C. Inadequate suspension D. Weak hip extensors - Answer D. Weak hip extensors The gluteus medius is most active during: A. Initial contact B. Mid-stance C. Pre-swing D. Double limb support - Answer B. Mid-stance Which of the following is a characteristic of a constant friction knee? A. Eliminates the need for alignment stability B. Aides in stabilization of the knee during stance C. Supports body weights when the knee is slightly flexed D. Reduces heel rise and terminal impact at normal cadence E. Permits the knee to swing at varying speeds depending on cadence - Answer D. Reduces heel rise and terminal impact at normal cadence The toe of a TF prosthesis rotates externally at heel strike. Which is the MAIN cause of this problem? A. Knee externally rotated B. Excessive toe out C. Keel too short D. Plantar flexion resistance too firm - Answer D. Plantar flexion resistance too firm During normal human locomotion, how far does the center of gravity travel in the coronal plane? A. 1 inch B. 2 inches C. 3 inches D. 4 inches - Answer B. 2 inches To minimize lateral bending of the trunk due to unilateral hip abductor weakness, it is best to use: A. A cane on the ipsilateral side B. A cane on the contralateral side C. A cane on both sides D. Forearm crutches - Answer B. A cane on the contralateral side Surgical attachment of muscle to muscle is called: A. Myoplasty B. Myodesis C. Arthoplasty D. Arthrodesis - Answer A. Myoplasty The center of gravity reaches its highest point at: A. Initial contact B. Loading response C. Mid-stance D. Pre-swing - Answer C. Mid-stance During normal human locomotion, between heel contact and foot flat, the ground reaction force tends to cause which moments at the hip and knee? A. Hip flexion, knee flexion B. Hip flexion, knee extension C. Hip extension, knee flexion D. Hip extension, knee extension - Answer A. Hip flexion, knee flexion If the sciatic nerve is severed at the level of the lesser trochanter, muscle function will NOT be impaired at the: A. Hip joint B. Knee joint C. Ankle joint D. Subtalar joint - Answer A. Hip joint What is not a load bearing area for a PTB TT socket? A. Patellar tendon B. Anterior compartment C. Fibular head D. Popliteal fossa - Answer C. Fibular head Which muscle does NOT internally rotate the humerus? A. Subscapularis B. Pectoralis major C. Infraspinatus D. Latissimus dorsi - Answer C. Infraspinatus The elbow is flexed to 90 and a 40 pound weight is held in the hand. The distance from the elbow axis to the weight is 15 inches. How much force must the elbow flexors exert of their insertion is 2 inches from the elbow joint axis? A. 80 inch pounds B. 150 inch pounds C. 200 inch pounds D. 300 inch pounds E. 600 inch pounds - Answer D. 300 inch pounds External or outside locking joints were designed for which amputation level? A. Interscapulothoracic B. Shoulder disarticulation C. Mid-shaft humerus D. Elbow disarticulation E. Short trans-radial - Answer D. Elbow disarticulation Which is not a part of the transhumeral figure-of-8 harness? A. Anterior suspension strap B. Lateral suspension strap C. Control attachment strap D. Inverted "Y" strap - Answer D. Inverted "Y" strap Where should the cross point of a figure of 8 harness be located in relationship to the 7th cervical vertebrae? A. Inferior and toward the amputated side B. Inferior and towards the sounds side C. Superior and toward the amputated side D. Superior and toward the sound side - Answer B. Inferior and towards the sounds side