Scapular and Pectoral Regions Flashcards Preview

Anatomy Unit 3- Sav > Scapular and Pectoral Regions > Flashcards

Flashcards in Scapular and Pectoral Regions Deck (139)
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1

Connects UL to the axial skeleton

Clavicle and scapula

2

Where does the UL articular with the sternum

Sternoclavicular

3

Is the sternum apart of the pectoral girdle

Sternum

4

From manubrium of the sternum to the acromion of the scapula

Clavicle

5

to act as a strut for holding the UL free from the trunk so it may have maximum range of motion

Function of the clavicle

6

posterolateral aspect of thorax (2nd to 7th ribs) – connect the clavicle to the humerus

Scapula

7

Humerus
Radius
Ulna
Carpal bones (wrist)
metacarpal bones of hand
phalanges (fingers)

Superior portion of appendicular skeleton

8

Another word for pectoral girdle

Shoulder or Shoulder girdle

9

2 joints of the shoulder complex

Sternoclavicular
Acromioclavicular Glenohumeral joints.

10

a synovial ball and socket articulation of the head of the humerus and the glenoid cavity of the scapula.

Glenohumeral joint

11

Multiaxial with a wide ROM usually provided at the cost of skeletal stability.

Glenohumeral joint

12

What provides joint stability to pectoral girdle?

-rotator cuff muscles/tendons
-long head of the biceps brachii m.
-elated bony processes
-extracapsular ligaments

13

flexion, extension, abduction, adduction, medial rotation, lateral rotation and circumduction.

Movements of pectoral girdle

14

Shoulder pads

Deltoid m

15

Lats little helper

Teres major m

16

4 muscles of the rotator cuff

-Supraspinatus m
-Infraspinatus m
-Teres minor m
-Subscapularis m

17

Action of the deltoid

abducts humerus (1°), flexes, extends & rotates humerus (2°)

18

N: Axillary n. & Post. Circumflex Humeral vessels

Deltoid muscle

19

What vertebrae does the axillary nerve associated with?

C5, C6

20

Function of Teres Major

medially rotates & extends humerus

21

N: Lower (inferior) Subscapular n. & subscapular vessels

Teres Major muscle

22

Vertebrae associated with Lower subscapular nerve

C5-C7

23

Where does the action of teres major occur?

Glenohumeral joint

24

Contributes to adduction of the humerous

Teres Major m.

25

Action of Supraspinatus m.

abducts humerus (1st 15°)

26

What innervates Supraspinatus m

-Suprascapular n. & vessels
-Dorsal scapular vessels

27

1st 15 degrees of abduction – initiates the abduction but doesn’t drop out when the deltoid begins acting

Supraspinatus

28

. The supraspinatus continues to play an active role reaching its maximum at approximately

110 deg of abduction

29

Action of the infraspinatus m

Laterally rotates humerus

30

Innervation of infraspinatus

-Suprascapular n. & vessels -subscapular vessels

31

Spinal level associated with Suprascapular n

C5-C6

32

Spinal level associated with Axillary n

C5-C6

33

Action of Teres minor m

Lateral rotation of humerus

34

Innervention of Teres minor m

-Axillary N
-Suprascapular and subscapular vessels

35

Action of subscapularis

Medial rotation of humerus

36

Innervation of subscapularis m

-Upper and lower subscapular nn
-Subscapular vessels

37

Helps prevent upward displacement of head of humerus

Rotator cuff

38

Membranous sac containing lubricating synovial fluid

Subacromial (Subdeltoid) Bursa

39

Inferior to acromion & deltoid but superior to supraspinatus m.

Subacromial (Subdeltoid) Bursa

40

Does the subacromial bursa communicate with jt. capsule?

No

41

Bursa that are associated with the joint but not connected to it

Subacromial bursa and Supraspinatus muscle (joint capsule)

42

Between the acromnion

Subacromial (subdeltoid)

43

What causes the subacromial bursa to be continuous with the joint

Attrition of the supraspinatus tendon

44

When does the supraspinatus tendon usually degenerate?

Middle age

45

Up to ¼ of adults rupture supraspinatus tendon by

65

46

What happens when capsule opens, continuous with bursa

Painful shoulder with limited arm movement

47

Name the 3 spaces of the shoulder region

-Quadrangular space
-Triangular space
-Triangular interval

48

What goes through Quadrangular space

Axillary N. and Posterior circumflex humeral a.

49

What does through the triangular space

Circumflex scapular a

50

What goes through triangular interval

Radial N. and Profunda brachii a

51

Muscles of the quadrangular space

-Teres minor m
-Teres major m
-Long head of triceps brachii m

52

What does the quadrangular space contain?

Axillary n & posterior circumflex humeral vessels

53

Superior border of quadrangular space

Teres minor m

54

Inferior border of quadrangular space

Teres major m

55

Medial border of quadrangular space

Long head of triceps brachii m

56

Lateral border of quadrangular space

Surgical neck of humerus

57

What are the components of the triangular space

-Teres minor m
-Teres major m
-Long head of triceps brachii ,

58

What does the triangular space contain

Circumflex scapular vessels

59

What is the superior border of the triangular space?

Teres minor m

60

What is the inferior border of the triangular space?

Teres major m

61

What is the lateral border of the triangular space

long head of triceps brachii m.

62

What are the components triangular interval?

-Teres major m
-Long head of triceps brachii
-Lateral head of the triceps brachii.

63

What is superior border of the Triangular interval

Teres major m

64

What is the medial border of the triangular interval

Long head of the triceps brachii

65

What is the lateral border of the triangular interval

Lateral head of the triceps brachii m

66

What does the triangular interval?

Radial n & Deep brachial a

67

Another name for the deep brachial artery

Profunda brachial a

68

Neurovascular supply of the shoulder region

-Suprascapular n and a
-Dorsal Scapular n and a
-Accessory n. and transverse cervical a.
-Upper and lower subscapular nerves and Subscapular art

69

What is the spinal correlation of Suprascapular N.

Ventral rami of C5-C6

70

Runs under supr. trans. scap. lig. thru suprascap. notch

Suprascapular nerve

71

What does the subscapular nerve branch off of?

Thyrocervical trunk

72

Runs over supr. trans. scap. lig. above suprascap. notch

Suprascapular artery

73

What does the suprascapular n and a supply?

Supraspinatus m and infraspinatus m

74

Pass thru spinoglenoid notch to infraspinatus fossa

Suprascapular n and a

75

Runs under the superior transverse scapular ligament

Suprascapular nerve

76

Passes over the superior transverse scapular ligament

Suprascapular artery

77

What does the dorsal scapular nerve come off of?

Ventral ramus of C5

78

What does the deep trans. cervical a come off of

Deep trans. cervical a.

79

What does the dorsal scapular nerve and deep transverse cervical a supply?

Levator scapulae and rhomboid mm

80

Run parallel to vertebral border of scapula

dorsal scapular nerve and deep transverse cervical a

81

What does the accesory nerve come off of?

Brainstem (CN XI)

82

What does the transverse cervical artery come off of

Superficial transverse cervical a

83

Branch of the thryocervical trunk

Superficial transverse artery

84

Runs deep to trapezius m

Superficial transverse a

85

What do the accesory n and transverse cervical a supply

Trapezuis

86

What is on the deep surface of trapezius m

Accessory n

87

ventral rami (cut) at the medial edge that contribute to the plexus

C3-C4

88

runs deep to the trapezius m., posterolaterally from the thyrocervical trunk

Transverse cervical a. and v.

89

Comes off of the posterior cord of brachial plexus

Upper and lower Subscapular Nerves

90

Ventral rami of C5-C6

Upper and lower Subscapular Nerves

91

Comes off of the axillary artery

Subscapular artery

92

What does the subscapular artery split into

-Thoracodorsal a
-Circumflex scapular a

93

What does the upper and lower subscapular nerves and subscapular a supply?

Subscapularis m

94

What supplies teres major m

Lower subscapular nerve and subscapular artery

95

What does the subscapular artery anastome with

Suprascapular and dorsal scapular artery

96

What type of circulation is in the scapular region

Collateral

97

What ensures adequate blood supply to UL

Collateral circulation of the scapular region

98

In event of insufficient circulation where does collateral circulation flow through?

Axillary a / temporary ligation

99

What is collateral circulation by?

Thyrocervical trunkn and subscapular a

100

Ligated axillary a ligates between

thyrocervical trunk and subscapular artery

101

Where is the blood flow in scapular region reversed in collateral circulation

Subscapular artery

102

Where can blood not flow to UL if there is damage

Anywhere distal to scapula

103

Region of m. attachment between upper limb and anterior chest

Pectoral Region

104

What is the pectoral region composed of

Pec major m and pec minor m

105

What is the pec major divided into

Clavicular and sternocostal heads

106

What envelopes pec minor

Clavipectoral fascia

107

What is the action of pectoralis major

Adducts and medially rotates humerus

108

What innervates the pectoralis major m

-Medial and lateral pectoral muscle
-Thoracoacrominal vessels

109

Action of pectoralis minor

Protracts scapular

110

What innervates pectoralis minor

-Medial pectoral n
- Thoracoacromial vessels

111

Pectoral region arterial supply

-Lateral thoracic (mammary) a
- Internal thoracic (mammary) a
-Thoracoacromial a

112

What is the lateral thoracic artery a branch of

Axillary a

113

What does the lateral thoracic a run with

long thoracic n

114

Supplies lateral thorax, lateral pec region, and lateral breast

Lateral thoracic artery

115

What does the lateral thoracic artery run superficial to

Serratus anterior m

116

What is the thoracoacromial artery a branch of

Axillary a. (under pec minor)

117

4 branches off of thoracoacromial artery

-Pectoral a
-Clavicular a
-Acromial a
-Deltoid a

118

What branch of thoracoacromial artery supplies upper pec region

Pectoral a

119

Branch of thoracoacromial a that supplies clavicle region

Clavicular a

120

Branch of thoracoacromial a that supplies upper should region

Acromial a

121

Branch of thoracoacromial a that supplies lower shoulder region

Deltoid a

122

Pectoral region innervation

-Cutaneous nerves
-Medial pectoral nerve
-Lateral pectoral nerve
-Long thoracic nerve

123

Spinal level of cutaneous nerves

T1-T6

124

lateral & anterior cutaneous branches of intercostal nn.

Cutaneous nerves

125

Purpose of cutaneous nerves

General sensory

126

Medial cord of brachial plexus

Medial pectoral nerve

127

Where is the median pectoral nerve derived from?

Ventral rami
C8-T1

128

What does the medial pectoral nerve pierce and enter?

Pierces pectoralis minor m to enter pectoralis major m

129

What does the medial pectoral nerve supply?

Pectoralis minor m and part of pectoralis major m

130

Lateral cord of brachial plexus

Lateral pectoral nerve

131

Where is the lateral pectoral nerve derived from

Ventral rami
C5-C7

132

Runs above pectoralis minor m. to enter pectoralis major m.

Lateral pectoral nerve

133

What does the lateral pectoral nerve supply

Pec major m

134

Where is the long thoracic nerve derived from

Ventral rami
C5-C7

135

What does the long thoracic nerve supply?

Serratus anterior m superficially

136

What can be damaged during mastectomy

Long thoracic nerve

137

What does damage to the long thoracic nerve cause

Winged scapula

138

Holds UL to thoracic wall

Long thoracic nerve

139

Lies on the superficial surface of serratus anterior

Long thoracic nerve