General Px Flashcards

1
Q

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

A

2

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2
Q

Center of gravity in adult male

A

2nd sacral vertebra

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3
Q

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

A

A cane on the uninvolved side

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4
Q

Body’s center of gravity reaches its highest point at

A

Mid-stance

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5
Q

Pressure is determined by

A

Force divided by areea

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6
Q

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

A

Hip flexion and knee flexion

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7
Q

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

A

Hip joint

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8
Q

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

A

Invert and plantar flex the foot

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9
Q

Biceps femoris

A

Flexes the knee joint

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10
Q

Bones that form the acetabulum

A

Ilium, Pubis, and Ischium

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11
Q

Normal hip reaches its maximum extension during

A

Heel-off

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12
Q

The iliopsoas inserts on the

A

Lesser trochanter

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13
Q

Major function of the iliac crest in a hip disarticulation

A

Provide an area for suspension

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14
Q

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

A

Lateral stability during stance phase

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15
Q

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

A

Posterior to hip, Anterior to knee

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16
Q

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

A

Heel sedge that is too hard

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17
Q

The symphysis pubis is

A

The anterior junction of the pelvic bones

18
Q

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

A

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

*NOT greater residual ROM

19
Q

Pt with loss of thumb only would probably benefit most from

A

An opposition post

20
Q

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

A

The thumb and index finger remaining

21
Q

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

22
Q

TD offers the best tool handling capabilities

A

Dorrance 7 (farmer’s hook)

23
Q

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

A

Proximal trim line is proximal to epicondyles

24
Q

Supination and pronation of the forearm occur where

A

Proximal radioulnar

25
Which muscle is missing in the medium length BE
Pronator quadratus
26
What is not part of the BE figure-of-eight harness
Lateral suspension strap
27
If a BE Px is harnessed with a split cable housing, which Px joints has most likely been utilized
Step-up hinge
28
A BE Px with flexible hinges should not inhibit flexion at the elbow more than
10 deg
29
Primary advantage of a voluntary closing TD
Graded prehension
30
Which component provides the greatest ROM for bilateral BE amputee
Wrist flexion unit (Sierra type)
31
Loss of the upper limb just distal to the supinator muscle will result in what amputation level
Short BE RL
32
Modification (2) is made to the figure-of-eight harness for bilateral BE Pt
The axilla loops are unnecessary and a cross back strap is added
33
When a voluntary opening Px hand is activated, the cable replaces function normally provided by the
Extensor carpi radialis longus and brevis
34
Prehension patterns (3) provided by a Px hand
Cylindrical, spherical, and palmar
35
Main supinator of the forearm
Biceps
36
An excursion amplifier incorporated in a control system provides increased cable excursion at the expense of
Requiring more force
37
When the elbow flexion attachment of the AE forearm is moved toward the TD, it will have what mechanical effect
Decrease force and increase excursion required
38
Characteristics (4) of the ED amputation
-Provides rotational stability -Preserves a long lever arm -Prevents bony overgrowth -Leaves the epiphyseal plates intact
39
AE amputation is sometimes performed for a complete brachial plexus injury. What other steps would be helpful
Shoulder fusion
40
Brachioradialis muscle acts primarily to
Flex the elbow joint
41
The Px designed for a Pt with a proximal femoral focal deficiency (PFFD) generally utilizes ischial and gluteal WB because
Hip joint is unstable or non-existent
42
Main hip flexor
Iliopsoas