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MUSCLES > Shoulder & Pectoral Region > Flashcards

Shoulder & Pectoral Region Flashcards

1
Q

Infraspinatus - blood supply

A

suprascapular artery

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2
Q

Infraspinatus - action

A

lateral rotation of arm

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3
Q

Infraspinatus - origin

A

medial 2/3 of infraspinous process of scapula

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4
Q

Infraspinatus - insertion

A

greater tubercle of humerus

medial facet on posterior side

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5
Q

infraspinatus - innervation

A

suprascapular n.

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6
Q

supraspinatus - blood supply

A

suprascapular artery

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7
Q

supraspinatus - action

A

ABduction of arm (0-15*)

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8
Q

supraspinatus - origin

A

greater tubercle of humerus

superior facet

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9
Q

supraspinatus - innervation

A

suprascapular n.

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10
Q

subscapularis - blood

A

subscapular a. & lateral thoracic a.

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11
Q

subscapularis - action

A

medial rotation of arm

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12
Q

subscapularis - origin

A

medial 2/3 of scapular fossa

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13
Q

subscapularis - insertion

A

lesser tubercle of humerus

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14
Q

subscapularis - innervation

A

lower & upper subscapular n.

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15
Q

teres major - blood

A

circumflex scapular a.

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16
Q

teres major - action

A

ADduction of arm

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17
Q

teres major - origin

A

inferior angle of scapula (posterior surface)

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18
Q

teres major - insertion

A

intertubercular sulcus of humerus (medial lip)

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19
Q

teres major - innervation

A

lower subscapular n.

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20
Q

deltoid - blood

A
  • posterior circumflex humoral artery

- deltoid branch of thoracic-acromial artery

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21
Q

deltoid - action

A

C - medial rotation of arm
A - ABduction of arm (>15*)
S - lateral rotation of arm

22
Q

deltoid - origin

A
  • anterior border of lateral 1/3 of clavicle
  • lateral margin of acromion
  • crest of spine of scapula
23
Q

deltoid - insertion

A

deltoid tuberosity of humerus

24
Q

deltoid innervation

A

axillary n.

25
Q

teres minor - blood

A

circumflex scapular a.

26
Q

teres minor - action

A

lateral rotation of arm

27
Q

teres minor - origin

A

posterior surface of scapula (adjacent to lateral border)

28
Q

teres minor - insertion

A

greater tubercle of humerus (inferior facet on posterior surface)

29
Q

teres minior - innervation

A

axillary n.

30
Q

pectoralis major - blood

A
  • pectoral branch of thoracoacromial a.

- perforating branches of internal thoracic a.

31
Q

pectoralis major - action

A
  • ADducts & medially rotates shoulder joint

- stablilizes scapula (interiorly & anteriorly)

32
Q

pectoralis major - origin

A
  • medial 1/2 clavicle (anterior)

- anterior surface of sternum, superior 6 costal cartilages

33
Q

pectoralis major - insertion

A

intertubercular sulcus (lateral lip)

34
Q

pectoralis major - innervation

A

lateral & medial pectoral nerves

35
Q

pectoralis minor - blood

A
  • pectoral branch of thoracoacromial a.

- intercostal lateral thoracic arteries

36
Q

pectoralis minor - action

A

stabilizes scapula (inferiorly & anteriorly)

37
Q

pectoralis minor - origin

A

ribs 3-5 (near costal cartilages)

38
Q

pectoralis minor - insertion

A

corocoid process of scapula (medial border & superior surface)

39
Q

pectoralis minor - innervation

A

medial pectoral nerve

40
Q

serratus anterior - blood

A

long thoracic a.

41
Q

serratus anterior - action

A
  • Protracts Scapula
  • Holds Scapula against Thoracic Wall
  • Rotates Scapula
42
Q

serratus anterior - origin

A

ribs 1-8 (external surfaces of lateral parts)

43
Q

serratus anterior - insertion

A

medial border of scapula (anterior surface

44
Q

serratus anterior - innervation

A

long thoracic nerve

45
Q

subclavius - blood

A

clavicular branch of thoracoacromial a

46
Q

subclavius - action

A

anchors & depresses clavicle

47
Q

subclavius - origin

A

junction of rib 1 and its costal cartilage

48
Q

subclavius - insertion

A

middle 1/3 of clavicle (inferior surface)

49
Q

subclavius - innervation

A

subclavian n.

50
Q

muscles of rotator cuff

A

Super Into Tiny Subs

supraspinatus
infraspinatus
teres minor
subscapularis

MUSCLES (3 decks)

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