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F16: Anatomy Test 3 > G: Scapular & Pectoral > Flashcards

G: Scapular & Pectoral Flashcards

(59 cards)

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1
Q

What is the action of the deltoid muscle?

A

Primary: abduct humerus

Secondary: Flex, extend, & rotate humerus

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2
Q

Deltoid nurovasculature?

A

Axillary nerve (C5, C6)

posterior circumflex humeral vessels

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3
Q

Teres major muscle actions?

A

Medially rotate and extend humerus

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4
Q

Teres major nurovasculature?

A

Lower (inferior) subscapular nerve (C5-C7)

subscapular vessels

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5
Q

Supraspinatus muscle action?

A

Abducts humerus for the first 15 degrees

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6
Q

Supraspinatus muscle nurovasculature?

A

Suprascapular nerve (C5, C6)

suprascapular vessels and dorsal scapular vessels.

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7
Q

Infraspinatus muscle action?

A

Laterally rotates the humerus

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8
Q

Infraspinatus muscle nurovasculature?

A

Suprascapular nerve (C5, C6)

suprascapular vessels and subscapular vessels

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9
Q

Teres minor muscle actions?

A

Lateral rotation of the humerus

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10
Q

Teres minor muscle nurovasculature

A

Axillary nerve (C5, C6)

suprascapular vessels and subscapular vessels.

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11
Q

Subscapularis muscle actions?

A

Medial rotation of the humerus.

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12
Q

Subscapularis muscle nurovasculature?

A

Upper and lower subscapular nerves

subscapular vessels

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13
Q

What provides the outer muscular support of the shoulder region?

A

Deltoid muscle

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14
Q

What muscles provide the inner rotator cuff support of the shoulder region.

A

SITS

Supraspinatus: superior

Infraspinatus: lateral

Teres minor: lateral/slightly inferior

Subscapularis: medial/slightly inferior

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15
Q

What is found in the subacromial bursa?

A

Lubricating synovial fluid

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16
Q

Does the subacromial bursa communicate with the joint capsule?

A

No. It is superior to the supraspinatus muscle

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17
Q

What happens to the subacromial bursa with age?

A

May join with joint capsule as supraspinatus tendon degenerates.

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18
Q

What are the borders of the quadrangular space?

A 
Superior = teres minor
Inferior = teres major
Medial = long head of triceps brachii
Lateral = surgical neck of humerus
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19
Q

What passes through the quadrangular space?

A

Axillary nerve and posterior circumflex humeral vessels

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20
Q

What are the borders of the triangular space?

A

Superior: Teres minor
Inferior: teres major
Lateral: long head of triceps brachii

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21
Q

What passes through the triangular space?

A

Circumflex scapular vessels

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22
Q

What are the borders of the triangular interval?

A 
Superior = teres major
Medial = long head of triceps brachii
Lateral = lateral head of triceps brachii
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23
Q

What passes through the triangular interval?

A

Radial nerve and deep brachial artery (aka profunda brachial artery)

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24
Q

How do the suprascapular nerve and artery differ in their paths?

Study These Flashcards
A

Nerve: runs UNDER superior transverse scapular ligament and THRU suprascapular notch

Artery: runs OVER sup trans scap lig and ABOVE suprascapular notch

25
What muscles do the suprascapular nerve and artery supply?
Supraspinatus and infraspinatus
26
What cervical nerves supply the suprascapular nerve?
Ventral rami of C5-C6
27
What cervical rami supple the dorsal scapular nerve?
Ventral ramus of C5
28
What muscles do the dorsal scapular nerve and deep transverse cervical artery supply?
Levator scapulae & rhomboid muscles
29
What nerve runs with the deep transverse cervical artery?
Dorsal scapular nerve
30
What nerve runs along the transverse cervical artery?
Accessory nerve (CN XI) after descending through the neck.
31
T/F: Superficial transverse cervical artery runs deep to the trapezius muscle?
True
32
What muscle do the accessory nerve and transverse cervical artery supply?
Trapezius muscle
33
What muscle do the upper and lower subscapular nerves and subscapular artery supply?
All: subscapularis muscle Lower subscapularis nerve & subscapularis artery: teres major
34
What is the reasoning for collateral circulation?
Ensures adequate blood supply to UL in event of insufficient flow through axillary artery
35
Where is the ligature for the collateral circulation of the scapular region?
On the axial artery between the thyrocervical truck and subscapular artery
36
Is the sternum part of the pectoral girdle?
NO
37
What are the three functions of the clavicle bone?
1. Holding UL free from trunk for max range of motion 2. Provide attachments for muscles 3. Transmit forces from UL -> axial skeleton
38
What bone connects the clavicle to the humerus?
Scapula
39
What ribs do the scapula span vertically?
2nd - 7th
40
What are the three joints of the shoulder complex?
1. Sternoclavicular 2. Acromioclavicular 3. Glenohumeral
41
What is the action of the pectoralis major muscle?
Adducts and medially rotates humerus
42
What is the nurovasculature for the pectoralis major muscle?
medial and lateral pectoral nerve Thoracoacrominal vessels
43
What is the action of pectoralis minor muscle?
Protracts scapular
44
What is the neurovascular supply of the pectoralis minor muscle?
Medial pectoral nerve Thoracoacromial vessels
45
What major artery does the lateral thoracic artery branch from?
Axillary artery (deep to pec minor)
46
What does the lateral thoracic artery supply?
Lateral thorax, lateral pec region, lateral breast
47
What major artery does the internal thoracic artery branch from?
Subclavian artery
48
What does the internal thoracic artery supply?
Anterior thorax, medial pec region, medial breast
49
What major artery does the thoracoacromial artery branch from?
Axillary artery (under pec minor)
50
What are the four branches of the thoracoacromial artery?
Pectoral artery - upper pec region Clavicular artery - clavicle region Acromial artery - upper shoulder region Deltoid artery - lower shoulder region
51
What vertebral levels give rise to the cutaneous nerves of the pectoral regions?
T1-T6
52
What ventral vertebral rami give rise to the medial pectoral nerve?
C8-T1
53
What muscle(s) does the medial pectoral nerve innervate?
Pectoralis minor and part of pec major
54
What ventral vertebral rami give rise to the lateral pectoral nerve?
C5-C7
55
What muscle does the lateral pectoral nerve innervate?
Pectoralis major
56
Which pectoral nerve pierces the pectoralis minor muscle?
Medial pectoral nerve
57
What ventral vertebral rami give rise to the long thoracic nerve?
C5-C7
58
What muscle does the long thoracic nerve supply?
Serratus anterior superficially
59
What nerve can be damaged during a mastectomy resulting in a "winged scapula"?
Long thoracic nerve

F16: Anatomy Test 3 (11 decks)

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