General Px

Question 1

During normal human locomotion, how many inches does the center of gravity shift from side to side

Answer 1

2

Question 2

Center of gravity in adult male

Answer 2

2nd sacral vertebra

Question 3

To minimize lateral bending of the trunk subsequent to unilateral hip abductor weakness, it is best to use

Answer 3

A cane on the uninvolved side

Question 4

Body’s center of gravity reaches its highest point at

Answer 4

Mid-stance

Question 5

Pressure is determined by

Answer 5

Force divided by areea

Question 6

Normal gait, between heel contact and foot flat, the floor reaction force tends to cause which moments at the hip and knee

Answer 6

Hip flexion and knee flexion

Question 7

If the sciatic nerve is severed at the level of the lesser trochanter, muscle function will not be impaired at the

Answer 7

Hip joint

Question 8

Muscles which pass posterior to the medial malleolus at the ankle act to

Answer 8

Invert and plantar flex the foot

Question 9

Biceps femoris

Answer 9

Flexes the knee joint

Question 10

Bones that form the acetabulum

Answer 10

Ilium, Pubis, and Ischium

Question 11

Normal hip reaches its maximum extension during

Answer 11

Heel-off

Question 12

The iliopsoas inserts on the

Answer 12

Lesser trochanter

Question 13

Major function of the iliac crest in a hip disarticulation

Answer 13

Provide an area for suspension

Question 14

In a Canadian HD socket, what is not affected by A-P placement of the hip joint

Answer 14

Lateral stability during stance phase

Question 15

With respect to the hip and knee joints at midstance, the floor reaction line for a hip disarticulation Px passes

Answer 15

Posterior to hip, Anterior to knee

Question 16

During ambulation, instability of the knee at heel strike with a hip disarticulation Px may be caused by

Answer 16

Heel sedge that is too hard

Question 17

The symphysis pubis is

Answer 17

The anterior junction of the pelvic bones

Question 18

Immediate post-surgical fitting of upper limb amputee offer what advantages (3)

Answer 18

-Early maturation of the RL
-More rapid rehabilitation
-Early return of 2-handed grasping patterns

*NOT greater residual ROM

Question 19

Pt with loss of thumb only would probably benefit most from

Answer 19

An opposition post

Question 20

Mechanical partial hand Px would probably be contraindicated for a transmetacarpal amputation with

Answer 20

The thumb and index finger remaining

Question 21

Amount of residual supination and pronation retained by a wrist disarticulation Pt while wearing a Px should be at least

Answer 21

50%

Question 22

TD offers the best tool handling capabilities

Answer 22

Dorrance 7 (farmer’s hook)

Question 23

What would cause decrease pronation and supination in a wrist disarticulation Pt

Answer 23

Proximal trim line is proximal to epicondyles

Question 24

Supination and pronation of the forearm occur where

Answer 24

Proximal radioulnar

Question 25

Which muscle is missing in the medium length BE

Answer 25

Pronator quadratus

Question 26

What is not part of the BE figure-of-eight harness

Answer 26

Lateral suspension strap

Question 27

If a BE Px is harnessed with a split cable housing, which Px joints has most likely been utilized

Answer 27

Step-up hinge

Question 28

A BE Px with flexible hinges should not inhibit flexion at the elbow more than

Answer 28

10 deg

Question 29

Primary advantage of a voluntary closing TD

Answer 29

Graded prehension

Question 30

Which component provides the greatest ROM for bilateral BE amputee

Answer 30

Wrist flexion unit (Sierra type)

Question 31

Loss of the upper limb just distal to the supinator muscle will result in what amputation level

Answer 31

Short BE RL

Question 32

Modification (2) is made to the figure-of-eight harness for bilateral BE Pt

Answer 32

The axilla loops are unnecessary and a cross back strap is added

Question 33

When a voluntary opening Px hand is activated, the cable replaces function normally provided by the

Answer 33

Extensor carpi radialis longus and brevis

Question 34

Prehension patterns (3) provided by a Px hand

Answer 34

Cylindrical, spherical, and palmar

Question 35

Main supinator of the forearm

Answer 35

Biceps

Question 36

An excursion amplifier incorporated in a control system provides increased cable excursion at the expense of

Answer 36

Requiring more force

Question 37

When the elbow flexion attachment of the AE forearm is moved toward the TD, it will have what mechanical effect

Answer 37

Decrease force and increase excursion required

Question 38

Characteristics (4) of the ED amputation

Answer 38

-Provides rotational stability
-Preserves a long lever arm
-Prevents bony overgrowth
-Leaves the epiphyseal plates intact

Question 39

AE amputation is sometimes performed for a complete brachial plexus injury. What other steps would be helpful

Answer 39

Shoulder fusion

Question 40

Brachioradialis muscle acts primarily to

Answer 40

Flex the elbow joint

Question 41

The Px designed for a Pt with a proximal femoral focal deficiency (PFFD) generally utilizes ischial and gluteal WB because

Answer 41

Hip joint is unstable or non-existent

Question 42

Main hip flexor

Answer 42

Iliopsoas