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Anatomy (MSTP) > Pectoral Region and Rotator Cuff Muscles > Flashcards

Pectoral Region and Rotator Cuff Muscles Flashcards

1
Q

serratus anterior origin

A

lateral parts of ribs 1-8

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2
Q

serratus anterior insertion

A

medial border of scapula

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3
Q

serratus anterior action

A

protract the scapula, hold scapula against thoracic wall

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4
Q

serratus anterior innvervation

A

long thoracic nerve (c5-7)

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5
Q

serratus anterior artery

A
  1. lateral thoracic artery
  2. superior thoracic artery (superior part of muscle)
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6
Q

subclavius origin

A

first rib and its cartilage

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7
Q

subclavius insertion

A

inferior surface of the clavicle

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8
Q

subclavius action

A

anchors and depresses clavicle

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9
Q

subclavius innervation

A

nerve to subclavius (C5)

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10
Q

subclavius artery

A

clavicular branch of the thoracoacromial artery

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11
Q

pectoralis major origin

A

sternum
superior six costal cartilages
aponeurosis of ribs

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12
Q

pectoralis minor origin

A

ribs 3-5 near their costal cartilages

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13
Q

pectoralis major insertion

A

lateral lip - intertubercular sulcus of humerus

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14
Q

pectoralis minor insertion

A

coracoid process of scapula

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15
Q

pectoralis major action

A

MR. FLAD

medial rotation
flexion
aDduction

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16
Q

pectoralis minor action

A

pull the scapula inferiorly and anteriorly against thoracic wall

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17
Q

pectoralis major nerve

A

medial (c8,T1) and lateral pectoral nerve (C5-7)

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18
Q

pectoralis minor nerve

A

medial pectoral nerve (C8,t1)

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19
Q

pectoralis major and minor artery

A

pectoral branch of thoracoacromial artery

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20
Q

supraspinatus origin

A

supraspinatus fosa

21
Q

supraspinatus insertion

A

greater tubercle of the humerus (highest facet)

22
Q

supraspinatus action

A

aBduction (first 10-15 degrees)
hold humerus in joint
lesser role in helping extension of the arm

23
Q

supraspinatus innervation

A

suprascapular nerve (c4-6)

24
Q

supraspinatus artery

A

suprascapular artery

25
Q

infraspinatus origin

A

infraspinous fossa

26
Q

infraspinatus insertion

A

greater tubercle of the humerus (middle facet)

27
Q

infraspinatus action

A

laterally rotates the arm
muscle tone helps hold humerus in joint
lesser role in helping extension of the arm

28
Q

infraspinatus nerve

A

suprascapular nerve (c5,6)

29
Q

infraspinatus artery

A

suprascapular artery
circumflex scapular artery

30
Q

teres minor origin

A

middle 1/3 of the lateral border of the scapula

31
Q

teres minor insertion

A

greater tubercle of the humerus (inferior facet)

32
Q

teres minor action

A

laterally rotates the arm
muscle tone helps hold humerus in joint
lesser role in helping extension of the arm

33
Q

teres minor nerve

A

axillary nerve (c5,6)

34
Q

teres minor artery

A

circumflex scapular artery
posterior circumflex humeral artery

35
Q

subscapularis origin

A

subscapular fossa (most of the anterior surface of scapula)

36
Q

subscapularis insertion

A

lesser tubercle of the humerus

37
Q

subscapularis action

A

medially rotates the arm and ADDucts it (Mr. AD)

muscle tone helps hold humerus in joint
lesser role in helping extension of the arm

38
Q

subscapularis innervation

A

upper and lower subscapular nerves (C5-7)

39
Q

subscapularis artery

A

subscapular artery

40
Q

teres major origin

A

dorsal surface of the inferior angle of the scapula

41
Q

teres major insertion

A

medial crest of the intertubercle sulcus of the humerus

42
Q

teres major action

A

MR. AD
medially rotates arm
adduction

assists the latissimus dorsi in extending the flexed arm

43
Q

teres major innervation

A

lower subscapular nerve (C5,6)

44
Q

teres major artery

A

thoracodorsal branch of the subscapular artery

posterior circumflex humeral artery

45
Q

deltoid origin

A

lateral 1/3 of the clavicle

acromion

lower lip of the crest of the spine of the scapula

46
Q

deltoid insertion

A

deltoid tuberosity of the humerus

47
Q

deltoid action

A

clavicular part = flexes + medially rotates the arm

acormial part = ABducts arm

spine of scapula part = extension + laterally rotates the arm

**stabilizes the glenohumeral joint during heavy lifting with an adducted arm (prevents humerus from moving inferiorly due to weight of lifted object)

48
Q

deltoid nerve

A

axillary nerve (C5,6)

49
Q

deltoid artery

A
  1. posterior circumflex humeral artery (most consistent supplier)
  2. acromial and deltoid branches of the thoracoacromial artery
  3. subscapular artery
  4. anterior circumflex humeral artery

Anatomy (MSTP) (3 decks)

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