Shoulder Flashcards

(64 cards)

1
Q

Borders of Triangular Space

A

Teres minor; Teres major; Triceps (long head)

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2
Q

Structure w/in Triangular Space

A

Circumflex scapular artery

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3
Q

Borders of Quadrangular Space

A

Teres minor; Teres major; Triceps (long head); Humerus (medial border)

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4
Q

Structures w/in Quadrangular Space

A

Axillary nerve; Posterior Circumflex artery; Humeral artery

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5
Q

Borders of Triangular Interval

A

Teres major; triceps (long head); triceps (lateral head)

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6
Q

Structures wi/in Triangular Interval

A

Radial nerve; Deep artery of arm

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7
Q

Muscles of the Rotator Cuff

A

Supraspinatus; Infraspinatus; Teres minor; Subscapularis

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8
Q

O/I of Supraspinatus

A

Supraspinatus fossa / Greater tuberosity (superior)

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9
Q

Most commonly torn rotator cuff tendon

A

Supraspinatus

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10
Q

Supraspinatus innervation

A

Suprascapular nerve (C5-6)

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11
Q

Supraspinatus action

A

Abduction

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12
Q

O/I of Infraspinatus

A

Infraspinatus fossa / Greater tuberosity (middle)

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13
Q

Infraspinatus innervation

A

Suprascapular nerve (C5-6)

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14
Q

Infraspinatus action

A

External rotation

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15
Q

O/I of Teres minor

A

Lateral scapula / Greater tuberosity (inferior)

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16
Q

Teres minor innervation

A

Axillary nerve (C5-6)

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17
Q

Teres minor action

A

External rotation

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18
Q

O/I of Subscapularis

A

Subscapular fossa / lesser tuberosity

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19
Q

Subscapularis innervation

A

Upper and lower subscapular nerve (C5-6)

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20
Q

Subscapularis action

A

Internal rotation

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21
Q

O/I of Deltoid

A

Clavicle, acromion, spine of scapula / Humerus (deltoid tuberosity)

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22
Q

Deltoid innervation

A

Axillary

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23
Q

Deltoid action

A

Abduction

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24
Q

Deltoid atrophy

A

Damage to Axillary nerve

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25
O/I of Teres major
Inferior angle of scapula / Humerus (intertubercular groove)
26
Teres major innervation
Low subscapular nerve
27
Teres major action
Internal rotation, adduction
28
O/I of Pectoralis major
Clavicle, Sternum / Humerus (intertubercular groove)
29
Pectoralis major innervation
Lateral pectoral (C5-7), Medial pectoral (C8, T1)
30
Pectoralis major action
Adducts arm, IR humerus
31
O/I of Pectoralis minor
Ribs 3-5 / Coracoid process
32
Pectoralis minor innervation
Medial pectoral (C8, T1)
33
Pectoralis minor action
Stabilizes scapula
34
Pectoralis minor as landmark...
Divides the axillary artery into 3 parts
35
O/I Serratus anterior
Ribs 1-8 / Scapula (anteromedial border)
36
Serratus anterior innervation
Long thoracic nerve (C5-7)
37
Serratus anterior action
Holds scapula to chest wall
38
O/I of Trapezius
C7-T12 spinous process / Clavicle, acromion, spine of scapula
39
Trapezius innervation
Cranial nerve XI
40
Trapezius action
Elevate and rotate scapula
41
O/I of Latissimus dorsi
T7-12, Iliac crest / Humerus (intertubercular groove)
42
Latissimus dorsi innervation
Thoracodorsal nerve (C7-8)
43
Latissimus dorsi action
Adduct, extend arm, IR humerus
44
Most common bone to fracture
Clavicle
45
Degrees of humeral head retroversion
35
46
Humeral head/neck angle
130
47
Risk in humeral anatomic neck fractures
Osteonecrosis
48
Spinoglenoid notch
Notch connecting supraspinous and infraspinous fossae
49
Muscles inserting on greater tuberosity
Supraspinatus, Infraspinatus, Teres minor
50
Muscles inserting on lesser tuberosity
Subscapularis
51
Most common fracture location in clavicle
Middle third
52
4 articulations of the shoulder
1. Sternoclavicular joing 2. Glenohumeral joint 3. Acromioclavicular joint 4. Scapulothoracic articulation
53
Ratio of GHJ to scapulothoracic motion during shoulder abduction/flexion
2:1
54
SGHL
Resists inferior translation and ER in shoulder adduction
55
MGHL
Resists anteroposterior translation in 45 degrees of abduction
56
AIGHL
Resists anterior and inferior translation in abduction and ER
57
PIGHL
Resists posterior translation in IR and 90 degree flexion
58
Buford complex
Thickened MGHL and absent anterior/superior labrum
59
Deforming forces in clavicle fx
- SCM pulls medial fragment posterosuperiorly | - Pectoralis, weight of arm pull lateral fragment inferomedially
60
Acromioclavicular ligament fx
Provides anterior/posterior stability
61
Components of coracoclavicular ligaments
- trapezoid | - conoid
62
Coracoclavicular ligament fx
Provides superior/inferior stability
63
Absolute indications for ORIF of Clavicle Fx
- Open Fxs - Displaced fracture w/ skin tenting - Subclavian artery or vein injury - Floating shoulder - Displaced middle third w/ >2cm shortening
64
Relative indications for ORIF of Clavicle Fx
- Brachial plexus injury - Closed head injury - Seizure disorder - Polytrauma patient