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Human Anatomy Exam III > Scapular & Pectoral Regions > Flashcards

Scapular & Pectoral Regions Flashcards

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1
Q

What are the two joints associated with the UL that are considered bony articulations (not muscle attachments)?

A

Sternoclavicular & acrmoioclavicular

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2
Q

What are the two components that comprise the coracoclavicular ligament?

A

Trapezoid (more lateral) and coroid (more medial) ligaments

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3
Q

What are the rotator cuff muscles?

A

SITS = supraspinatus, infraspinatus, teres minor, subscapularis

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4
Q

Deltoid origin

A

Lateral clavicle, acromion, and spine of scapula

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5
Q

Deltoid insertion

A

Deltoid tuberosity of humerus

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6
Q

Deltoid action

A

Abducts humerus (primary function), flexes, extends, and rotates humerus (secondary function)

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7
Q

Deltoid supply

A

Axillary n & posterior circumflex humeral vessels (located in quadrangular space)

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8
Q

Teres Major origin

A

Inferior angle of scapula

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9
Q

Teres Major insertion

A

Crest of lesser tubercle of humerus

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10
Q

Teres Major action

A

Medially rotates & extends humerus

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11
Q

Teres Major supply

A

Lower (inferior) sub scapular n & subscapular vessels

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12
Q

Supraspinatus origin

A

Supraspinous fossa

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13
Q

Supraspinatus insertion

A

Greater tubercle of humerus

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14
Q

Supraspinatus action

A

Initial 15 degrees of humerus abduction (then deltoid takes over)

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15
Q

Supraspinatus supply

A

Suprascapular n & vessels & dorsal scapular vessels

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16
Q

Infraspinatus origin

A

Infraspinous fossa

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17
Q

Infraspinatus insertion

A

Greater tubercle of humerus

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18
Q

Infraspinatus action

A

Laterally rotates humerus

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19
Q

Infraspinatus supply

A

Suprascapular n & vessels & subscapular vessels

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20
Q

Teres Minor origin

A

Lateral border of scapula

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21
Q

Teres Minor insertion

A

Greater tubercle of humerus

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22
Q

Teres Minor action

A

Lateral rotation of humerus

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23
Q

Teres Minor supply

A

Axillary n & suprascapular & subscapular vessels

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24
Q

Subscapularis origin

A

Subscapular fossa

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25
Subscapularis insertion
Lesser tubercle of humerus (more medially located than greater tubercle)
26
Subscapularis action & supply
Medial rotation of humerus | Upper & lower subscapular nn and subscapular vessels
27
What are the boundaries of the quadrangular space?
Superior: Teres Minor Inferior: Teres Major Medial: Long head of Triceps Brachii Lateral: Surgical neck of humerus
28
What is contained within the quadrangular space?
Axillary n & posterior circumflex humeral vessels
29
What are the boundaries of the triangular space?
Superior: Teres Minor Inferior: Teres Major Lateral: Long head of Triceps Brachii
30
What is contained within the triangular space?
Circumflex scapular vessels
31
What are the boundaries of the triangular interval?
Superior: Teres Major Medial: Long head of Triceps Brachii Lateral: Lateral head of Triceps Brachii
32
What is contained within the triangular interval?
Radial n & Deep Brachial a
33
What makes up the suprascapular nerve?
Ventral rami of C5-C6
34
Where does the suprascapular artery come from?
Thyrocervical trunk
35
What ligament is associated with the suprascapular n & a? Which goes over/under?
The nerve runs under superior transverse scapular ligament through the suprascapular notch, while the artery runs over the ligament above the notch
36
Suprascapular n & a action
Both pass through spinoglenoid notch to infraspinatus fossa & supply supraspinatus & infraspinatus mm
37
What makes up the dorsal scapular nerve?
Ventral rams of C5
38
Where does dorsal scapular artery come from?
Subclavian a or deep transverse cervical artery
39
Dorsal scapular n & a action
Both run parallel to vertebral border of scapula & supply levator scapulae & rhomboid mm
40
CN XI runs with which artery?
Transverse cervical artery
41
Where does transverse cervical artery come from?
Thyrocervical trunk
42
CN XI & transverse cervical a action
Both supply Trapezius m
43
Where do the upper and lower subscapular nerves come from?
Posterior cord of brachial plexus; ventral rami of C5-C6
44
Where does subscapular artery come from?
Third part of axillary artery
45
What are the two branches of the subscapular artery?
Thoracodorsal artery & circumflex scapular artery
46
Upper & lower subscapular nn & a action
All supply subscapularis m
47
What other muscle do lower subscapular n and subscapular a also supply?
Teres Major m
48
Collateral circulation of the scapular region is performed by which arteries?
Thyrocervical trunk & subscapular a
49
Ligating anywhere distal to what artery inhibits blood flow to UL?
Subscapular a
50
What two heads is Pectoralis Major divided into?
Clavicular and sternocostal heads
51
What fascia is Pectoralis Minor enveloped in?
Clavipectoral fascia
52
Pectoralis Major origin
Clavicle, sternum, and ribs 2-6
53
Pectoralis Major insertion
Crest of greater tubercle of humerus
54
Pectoralis Major action
Adducts & medially rotates humerus
55
Pectoralis Major supply
Medial & lateral pectoral nn & thoracoacromial vessels
56
Pectoralis Minor origin
Ribs 3-5
57
Pectoralis Minor insertion
Coracoid process of scapula
58
Pectoralis Minor action
Protracts scapula
59
Pectoralis Minor supply
Medial pectoral n & thoracoacromial vessels
60
What arteries supply the pectoral region?
Lateral & internal thoracic (mammary) arteries, thoracoacromial artery
61
Lateral thoracic artery is a branch of which artery?
Second part of axillary artery
62
Lateral thoracic artery runs with which nerve?
Long thoracic nerve
63
What does lateral thoracic artery supply?
Lateral thorax, lateral pec region, and lateral breast
64
Internal thoracic artery is a branch of what artery?
Subclavian a (inside thorax)
65
What is the pathway of internal thoracic artery?
Descends across intercostal spaces lateral to sternum
66
What does internal thoracic artery supply?
Anterior thorax, medial pectoral region, and medial breast
67
Thoracoacromial artery is a branch of which artery?
Second part of axillary artery
68
What are the four branches of thoracoacromial artery?
Pectoral, clavicular, acromial, deltoid
69
What kind of innervation is supplied by cutaneous nerves?
General sensory
70
Where do cutaneous nerves originate?
T1-T6
71
What are the branches off the cutaneous nerves?
Lateral & anterior cutaneous branches of intercostal nerves
72
Where does the medial pectoral nerve originate?
Medial cord of brachial plexus
73
From where is the medial pectoral nerve derived?
Ventral rami C8-T1
74
What muscle does medial pectoral nerve pierce?
Pectoralis minor m to enter Pectoralis major m
75
What muscles does medial pectoral nerve supply?
Pectoralis minor & part of Pectoralis major
76
Where does lateral pectoral nerve originate?
Lateral cord of brachial plexus
77
From where is lateral pectoral nerve derived?
Ventral rami C5-C7
78
What does lateral pectoral nerve supply?
Remainder of Pectoralis major muscle
79
From where is long thoracic nerve derived?
Ventral rami C5-C7
80
What muscle does long thoracic nerve supply?
Serratus anterior m superficially
81
Damage to long thoracic nerve (common during mastectomy) results in what?
"Winged scapula" = lose the close adherence of scapula to posterior wall

Human Anatomy Exam III (5 decks)

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