Shoulder, Arm, Elbow Flashcards

1
Q

Label all:

A
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2
Q

The 3 bones of the shoulder region:

A
  1. Clavicle
  2. Scapula
  3. Proximal Humerus
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3
Q

What four muscles attach to the vertbral border of the scapula?

A
  1. rhomboid
  2. trapezius
  3. levator scapulae
  4. serratus anterior (subscapular side)
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4
Q

Label all:

A
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5
Q

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6
Q

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A
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7
Q

What is the most frequent site of fracture on the proximal humerus?

A

surgical neck

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8
Q

Label all:

A
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9
Q

The three shoulder joints:

A
  1. sternoclavicular
  2. acromioclavicular
  3. glenohumeral
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10
Q

What kind of joint is the sternoclavicular joint?

A

saddle joint

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11
Q

What is located within the sternoclovicular joint and what is its function?

A
  • Articular disk; divides joint into two sections
  • Allows for movements in different planes
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12
Q

Instead of dislocating, what does the clavicle do instead in response to excessive force?

A
  • fractures mid-shaft
    • protects the carotid artery and trachea behind the sternoclavicular joint from dislocation.
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13
Q

When you have a clavicle fracture mid-shaft, what pulls the lateral side downward?

A

gravity/weight of the limb

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14
Q

When you have a clavicle fracture mid-shaft, what pulls the medial side upward?

A

sternocleidomastoid muscle

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15
Q

What are the two ways to treat an overriding clavicular fracture?

A
  • non-surgical: figure-8 bandage (BONE LUMP)
  • surgical: plate and screws
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16
Q

The acromioclavicular joint is reinforced by:

A

coracoclavicular ligament

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17
Q

Shoulder separation is:

A

AC joint dislocation

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18
Q

Shoulder dislocation is:

A

glenohumeral joint dislocation

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19
Q

What injury and grade is this?

A

grade 1 shoulder separation

  • AC joint dislocation with NO coracoclavicular ligament tear.
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20
Q

What injury and grade is this?

A

grade 3 shoulder separation

  • AC joint dislocation with coracoclavicular ligament tear.
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21
Q

What kind of joint is the glenohumeral joint?

A

ball and socket

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22
Q

Label all:

A
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23
Q

Role of the subacromial bursa:

A
  • lubrication and decrease friction
  • bursitis = inflammation of the bursa
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24
Q

The two ligaments that support the glenhumeral joint:

A
  • coracohumeral ligament
  • glenoid labrum

MAIN SUPPORT ARE

THE ROTATOR CUFF MUSCLES

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25
The rotator cuff muscles are:
**SITS** * Supraspinatus * Infraspinatus * Teres Minor * Subscapularis
26
What is this an image of?
* rotator cuff tear
27
Muscles involved in arm abduction:
* Supraspinatus (first 40 degrees) * Deltoid (40-180 degrees) ## Footnote **DELTOID CANNOT START ABDUCTION SUPRASPINATUS MUST START ABDUCTION**
28
Weakest point of glenohumeral joint:
glenoid ligament inferior and anterior ## Footnote **WHERE DISLOCATION OF THE** **GLENOHUMERAL JOINT OCCURS**
29
Three causes of glenohumeral dislocation:
1. excessive extension 2. hyperabduction 3. external rotation
30
The four abductor muscles of the shoulder:
1. deltoid 2. trapezius 3. supraspinatus 4. serratus anterior
31
In order to reach full 180 degrees abduction, what needs to occur at around 120 degrees?
* scapula needs to be upwardly rotated * trapezius and serratus anterior
32
Scapulohumeral rhythm:
* For every 3º of arm elevation: * 2º at glenohumeral joint * 1º at scapula, SC and AC joints
33
What are three bones of the arm and elbow joint?
1. Distal Humerus 2. Proximal Radius 3. Proximal Ulna
34
Label all (elbow joint):
35
Epicondyles of the elbow function:
attachment sites for forearm musculature
36
The capitulum and trochlea are covered in:
hyaline cartilage
37
What is the arrow pointing to and what bone is it formed by?
olecranon formed by ulna
38
What are the arrows pointing to?
* Left: radial head, radial neck, radial tuberosity * Right: coronoid, ulnar tuberosity
39
What is this an image of?
trochlear notch created by the coronoid of the ulna
40
Label all (elbow joint):
* OP = olecranon * C = capitulum
41
Label:
* Superior: medial epicondyle * Posterior: lateral epicondyle
42
The capitulum of the humerus contacts what bone in the elbow joint?
head of the radius
43
The trochlea of the humerus contacts what bone in the elbow joint?
trochlear notch of the ulna
44
The two joints located at the elbow:
1. Elbow joint 2. Radioulnar joint
45
What joint allows for flexion/extension of the forearm?
elbow joint
46
What joint allows for pronation/supination of the forearm?
Radioulnar joint * radius/ulna parallel in supination * radius/ulna crossed-over in pronation
47
What are the three ligaments of the elbow joint?
1. radial collateral ligament (LCL) 2. annular ligament 3. ulnar collateral ligament (MCL)
48
Label all:
* left: * top: radial collateral ligament * bottom: annular ligament (ring) * right: * top: ulnar collateral ligament * bottom: valgus stress
49
Valgus stress:
* a stress test to test for a ulnar collateral ligament (MCL) tear. * pressure is put on the point where the brachialis muscle inserts onto the ulna. ## Footnote **CIRCLED**
50
Elbow dislocation usually occurs in what direction?
posterior ULNA DISLOCATES POSTERIORLY
51
What happens in a radial dislocation?
* head of the radius dislocates inferiorly from the elbow joint * common in children
52
The ulna dislocates ______ from the elbow joint.
posteriorly
53
The radius dislocates ______ from the elbow joint.
inferiorly
54
Muscles of the anterior arm are functionally:
* flexors * innervated by musculocutaneous (arm) and median (forearm) nerves
55
Muscles of the posterior arm are functionally:
* extensors * innervated by radial nerve * deltoid/teres minor innervated by axillary nerve
56
The anterior compartment of the arm contains:
* Arm & Elbow Flexors * Musculocutaneous Nerve * Brachial Artery
57
The posterior compartment of the arm contains:
* Arm & Forearm Extensors * Radial Nerve * Deep Brachial Artery
58
Muscles of the anterior arm:
* long head of biceps brachii * short head biceps brachii * coracobrachialis * brachialis
59
What head of the biceps brachii goes into the intertubercular groove of the humeral head?
long head of biceps brachii
60
Insertion of the short head biceps brachii:
coracoid process
61
Insertion of the long head biceps brachii:
supraglenoid tubercle of scapula
62
What attaches the biceps brachii to the radius?
biceps brachii tendon
63
What attaches the biceps brachii to the ulna?
bicipital aponeuroses aponeurosis = flat tendon
64
The brachialis crosses what joint?
elbow
65
The coracobrachialis crosses what joint?
glenohumeral
66
The three posterior arm muscles:
1. triceps long head 2. triceps lateral head 3. triceps medial head
67
The triceps tendon attaches all three triceps muscles to:
olecranon of the ulna
68
What is the only tricep that crosses the glenohumeral joint?
long head of the tricep
69
Cubital fossa contains:
* brachial artery division into radial and ulnar arteries * radial nerve * **superficial fascia:** cubital veins form anastomotic connections between the cephalic and basilic veins
70
Cubital fossa location:
* depression on the anterior aspect of the elbow