Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Upper Extremity Biomechanics > GH 1 > Flashcards

GH 1 Flashcards

1
Q

What is the primary role of the shoulder?

A

To place the hand in a functional position

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How many anatomic and physiologic joints form the shoulder?

A

3 anatomic

1 physiologic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are the names of the 3 anatomic joints and the 1 physiologic joint that make up the shoulder?

A

Anatomic:
Glenohumeral joint
Sternoclavicular joint
Acromial Clavicular joint

Physiologic:
Scapulocostal joint

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Why is the scapulocostal joint not an anatomic joint?

A

It lacks a joint capsule

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the action of the scapulocostal joint?

A

It is necessary to allow the smooth gliding of the scapula over the ribs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

The convex articular surface of the proximal humerus is directed in which positions?

A

Slightly posteriorly, medially and superiorly

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Fibrocartilagenous rim that encircles the fossa and provides a greater surface of contact for the humerus.

A

Glenoid labrum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the function of the glenoid labrum?

A

Provide stability by providing a greater surface area for contact with the humerus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Which part of the clavicle is concave anteriorly?

A

Distal 1/3rd

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What structures does the proximal end of the clavicle articulate with?

A

upper and lateral edge of the Manubrium and the superior surface fo the first rib costocartilage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What lies between the clavicle and the manubrium?

A

Intra-articular disc

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is important about there being an intra-articular disc between the clavicle and manubrium?

A

It is important in preventing medial dislocations of the clavicle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

At what vertebral level is the spine of the scapula?

A

T3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

A ligament is painlessly palpated unless it is ___ or ___.

A

Injured or stretched

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Which ligament provides some reinforcement to the joint capsule anteriorly while helping to check external rotation and possibly abduction?

A

Glenohumeral ligaments

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Which ligament runs from the Coracoid process to the greater tubercle, reinforces the superior aspect of the capsule and checks for external rotation and possible extension?

A

Coracohumeral ligament

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Which ligament attaches across the greater and lesser tubercles and serves to contain the tendon of the long head of the biceps muscle?

A

Transverse humoral ligament

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Which ligament strengthens the superior aspect of the joint capsule, but is intrinsically weak and gives way when a force is applied to the acromionprocess or glenohumeral joint from above?

A

Acromioclavicular ligament

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What are the two major stabilizing ligaments of the acromioclavicular joint?

A

The coracoclavicular ligaments (conoid and trapezoid ligaments)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Which ligament twist on itself as it connects between the coracoid process and clavicle?

A

Conoid ligament

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Which ligament tightens on humoral abduction causing axial rotation of the clavicle which is necessary for full elevation of the arm?

A

Conoid ligament

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Which ligament connects between the coracoid process and the clavicle, but lies distal to the conoid ligament; its role is to check lateral movement of the clavicle, thereby preventing overriding of the clavicle on the acromion process?

A

Trapezoid ligament

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Which ligament prevents excessive scapular protraction by not allowing the scapuloclavicular angle to NARROW?

A

Trapezoid ligament

24
Q

Which ligament prevents excessive superior movement of the clavicle on the acromion as well as retraction of the scapula by not allowing the scapulclaviclar angle to WIDEN?

A

Conoid ligament

25
Q

Which ligaments reinforce the sternoclavicular joint capsule anteriorly and posteriorly?

A

Anterior and posterior sternoclavicular ligaments

26
Q

Which ligaments reinforce the sternoclavicular joint capsule superiorly?

A

Inter-Clavicular ligaments

27
Q

Which ligament lies just lateral to the joint, attaches between the clavicle and fist rib and serves to check elevation of the clavicle - its posterior fibers prevent medial movement and anterior fibers prevent lateral movement of the clavicle?

A

Costoclavicular ligament

28
Q

How many bursae are found in the should joint?

A

8 or 9

29
Q

Why are there so many bursae in the GH joint?

A

Because of the high degree of mobility and number outs muscles necessary to provide stability of the joint and to reduce friction between the moving parts.

30
Q

Which 2 bursae of the shoulder are of clinical significance?

A

Subscapular bursae

Subacromial (subdeltoid) bursae

31
Q

Which bursa lies beneath the subscapular is muscle and overlies as well as communicates with the anterior joint capsule?

A

Subscapular bursa

32
Q

Distention of which bursa occurs with articular effusion?

A

Subscapular bursa

33
Q

Which bursa extends over the supraspinatus tendon and under the acromion process and the deltoid muscle?

A

Subacromial (subdeltoid) bursa

34
Q

Which bursa is susceptible to impingement beneath the acromial arch and inflammation often follows supraspinatus tendinitis?

A

Subacromial (subdeltoid) bursa

35
Q

What is another name for the subacromial bursa?

A

Subdeltoid bursa

36
Q

What is another name for the subdeltoid bursa?

A

Subacromial bursa

37
Q

Although muscle tendons tend to lend stability to the joint they DO NOT prevent what?

A

Downward dislocation

38
Q

What are the 4 muscles of the rotator cuff?

A 
SITS
Supraspinatus
Infraspinatus
Teres minor
Subscapularis
39
Q

What prevents dislocation as they check the lateral excursion of the glenoid cavity which in turn allows downward movement of the humerus?

A

The horizontal fibers of the SITS muscles

40
Q

What are the factors that prevent downward dislocation of the shoulder?

A

The slope of the glenoid fossa
Tightening of the upper part of the capsule
Tightening of the coracohumeral ligament
Supraspinatus muscle working with posterior deltoid

41
Q

The tendon of which muscle originates within the joint capsule from the upper margin of the glenoid fossa as a continuation of the glenoid labrum; penetrating the capsule and passing through the intertubercular groove?

A

Long head of the Biceps

42
Q

What muscles are responsible for flexion?

A

Anterior deltoid
Coracobrachilais
Pectoralis major

43
Q

Which muscles are responsible for extension?

A

Latissimus dorsi
Teres major
Posterior deltoid

44
Q

Which muscles are responsible for adduction?

A

Middle deltoid
Supraspinatus
Serratus anterior

45
Q

Which muscles are responsible for adduction?

A

Pectoralis major

Latissimus dorsi

46
Q

Which muscles are responsible for external rotation?

A

Infraspinatus
Teres minor
Posterior deltoid

47
Q

Which muscles are responsible for internal rotation?

A 
Subscapularis
Pectoralis major
Latissimus dorsi
Teres major
Anterior deltoid
48
Q

Which muscles are responsible for scapular stabilization?

A

Trapezius
Serratus anterior
Rhomboids

49
Q

Which muscles are responsible for scapular retraction (medial glide)?

A

Rhomboid major

Rhomboid minor

50
Q

Which muscles are responsible for scapular elevation?

A

Trapezius

Levator scapulae

51
Q

What is the closed packed position for the glenohumeral joint?

A

Full abduction with external rotation

52
Q

What is the closed packed position of the acromioclavicular joint?

A

90 degrees of abduction

53
Q

What is the closed packed position for the sternoclavicular joint?

A

Full arm elevation

54
Q

What is the loose packed position for the glenohumeral joint?

A

55 degrees of abduction with 30 degrees of horizontal adduction

55
Q

What is the loosed packed position of the acromioclavicular joint?

A

Physiologic rest position

56
Q

What is the loose packed position for the sternoclavicular joint?

A

Physiologic rest position

57
Q

The first 0-90 degrees of abduction is a coupled motion of which two muscles?

A

Supraspinatus and deltoid

Upper Extremity Biomechanics (1 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions