Chapter 6 Worksheet
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University of Alabama, Birmingham *
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Course
307
Subject
Medicine
Date
Dec 6, 2023
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docx
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Uploaded by noahl150
Chapter 6 Worksheet
1.
What three bones make up the two joints we will discuss this chapter
RADIUS UNLA
HUMERUS
2.
Ulna is much larger __
proximaL
_____ than the radius, and the radius is much larger
_____
DISTAL
___ than the ulna
3.
What two bones serve as proximal attachments for muscles that flex/extend the elbow?
Scapula and humerus
4.
What two bones serve as distal attachments for muscles that flex/extend the elbow?
5.
What three bones serve as proximal attachments for muscles that pronate/supinate the
radioulnar joints?
Scapula, humerus, and ulna
6.
What bone serves as a distal attachment of the radioulnar joint muscles?
Radius
7.
What are the two bony land marks that make up the ture elbow joint?
Trochlea (of
humerus) and Trochlear notch (of ulna)
8.
There are 12 key bony land marks discussed in this chapter. Be able to list them and
picture their location in your head. These likely will not be directly asked on a test (with
exception to the ones that make up a joint) but knowing these will certainly help you to
visualize movements and understand ligament/complex injuries as material progresses.
9.
What are the 5 muscles that are discussed move elbow joint
? brachialis (lateral
portion), the anconeus, the supinator muscle, brachioradialis, and triceps brachii.
10.
What are the 3 muscles that are discussed with reference to the radioulnar joint?
pronator quadratus and pronator teres ,Supinator
11. What joint is considered the ‘true’ elbow joint?
Humero-ulnar Joint
12.
What two bony landmarks make up the humero-radial joint?
Capitulum (of humerus)
and Head of radius
13.
Describe the elbow joint. (ex. Explain what type of joint it is, the degree of freedom, and
the actions it is capable of)
The elbow complex is considered a synovial true hinge
joint. 1 Degree of Freedom – Flexion/Extension
14.
What is the hard and soft end point of the true elbow joint?
Hard is bone to none, soft
ismuscle
15.
What is stability in flexion dependent on? (think ligaments and specify which monitors
the medial and lateral aspects of the elbow
)
RCL , UCL
16.
Which ligament is most commonly injured in throwing and why is it most commonly
injured?
UCL
17.
What ligament holds the head of the radius in place and what type of effect does it
have?
Annular ligament “sling effect” around radial head for stability
18. What type of joint is the radioulnar joint?
a trochoid (or pivot) joint.
19.
What degree of freedom does the radioulnar joint have
? 1 degree Pronation/Supination
20.
What joins the ulna and the radius tightly together
? interosseous membrane
21.
Where does ALL radioulnar joint movement occur?
Proximally
22.
Where does NO radioulnar joint movement occur?
distally
23.
T or F: As the radioulnar joint goes through its ROM, GH & elbow muscles act to stabilize
or assist in the effectiveness of movement at the radioulnar joints
. TRUE
24. When tightening a screw with a screwdriver (which involves radioulnar
___PRONATION_____
), we tend to
___ExTERALLY ROTATE_____
the GH joint and
___FLEX_
the elbow joint
25. Conversely, when loosening a tight screw with radioulnar
_SUPINATION______
, we tend
to
___INTERNALLY___
rotate the GH joint and
_EXTEND_____
the elbow joint.
26. What is the carrying angle and what two things cause the carrying angle to be greater?
27. What is Cubitus Varus and what is Cubitus Valgus?
28. Define the following and say what joint each motion occurs at:
-
Flexion
movement of forearm toward shoulder by bending elbow to decrease angle
-
Extension
movement of forearm away from shoulder by straightening elbow to
increase angle.
-
Pronation
-
Supination
29.
Muscles that flex the elbow?
Biceps B, Brachioradiolas, Briacallis
30.
Muscles that extend the elbow?
TRICEPS BRIACHI, Anconeus
31. Muscles that supinate the elbow?
Brachioradialis ,Supinator, bicep brichia
32.
What muscles are assistive supinators?
Radial wrist extensors, Extensor pollicis longus,
Extensor indicis
33.
What muscles pronate the elbow
?
34.
What muscles are assistive pronators?
Flexor carpi radialis ,Palmaris longus
35. What is the halfway muscle and why?
Brachioradialis
36.
What is the primary muscle in elbow flexion?
BrachiALLIS**
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37.
T/F: Pronators are stronger than supinators.
FALSE