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Anatomy > Scapula/Humeral Muscles & Pec Region > Flashcards

Scapula/Humeral Muscles & Pec Region Flashcards

1
Q

3 Origin for Trapezius

A

External Occipital Protuberance
Superior Nuchal Line
Spinous Processes of C7-T12

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2
Q

3 Insertion of Trapezius

A

Acromion Process
Spine of Scapula
Lateral 1/3 of the Clavicle

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3
Q

What is the innervation of trapezius?

A

Spinal accessory nerve CN XI

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4
Q

What are the actions for trapezius?

A
  • Upward rotation of the scapula
  • Upper fibers elevate scapula
  • Middle fibers retract scapula
  • Lower fibers depress scapula
  • Neck extension
  • Ipsi-lateral side bending of the neck
  • Contra-lateral rotation of the neck
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5
Q

5 Origins for latissimus dorsi

A 
Iliac Crest
Thoracolumbar Fascia
Inferior angle of the scapula
Lower 3-4 ribs
All the lumbar and sacral spinous processes
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6
Q

What is the insertion of latissimus dorsi?

A

Floor of the intertubercular groove (bicipital groove)

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7
Q

What is the innervation for latissimus dorsi?

A

Thoracodorsal nerve, C6-C8

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8
Q

What are the actions for latissimus dorsi?

A

Shoulder extension, adduction, and internal rotation

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9
Q

2 Origin of levator scapula

A

posterior tubercles, transverse processes of C1-C4

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10
Q

Insertion of levator scapula

A

Superior angle of scapula

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11
Q

Innervation of Levator Scapula

A

Dorsal scapular nerve C5

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12
Q

What are 4 actions for levator scapula?

A

Scapular elevation
Scapular downward rotation
Ipsi-lateral sidebending
Rotation of the neck

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13
Q

What is the origin of Rhomboids?

A

Spinous processess C7-T5

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14
Q

Insertion of Rhomboids?

A

Medial scapular border

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15
Q

Innervation of Rhomboids

A

Dorsal Scapular nerve C5

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16
Q

Actions of Rhomboids?

A

Scapular retraction and downward rotation

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17
Q

3 Origin of deltoid?

A

Scapular Spine
Acromion Process
Lateral 1/3 of Clavicle

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18
Q

Insertion of deltoid?

A

Deltoid Tuberosity (Humerus)

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19
Q

Innervation of Deltoid?

A

Axillary nerve C5-6

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20
Q

Actions of Deltoid?

A

Shoulder Abduction
Anterior fibers flex and internally rotate
Posterior fibers extend
Externally rotate

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21
Q

Origin of Supraspinatus?

A

Supraspinous fossa

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22
Q

Insertion of supraspinatus?

A

Superior facet greater tubercle of humerus

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23
Q

Innervation of supraspinatus?

A

Suprascapular nerve C5-6

24
Q

Action of supraspinatus?

A

Shoulder abduction

25
Q

Origin of infraspinatus?

A

Infraspinous fossa

26
Q

Insertion of infraspinatus?

A

Middle facet greater tubercle of humerus

27
Q

Innervation of infraspinatus?

A

Suprascapular nerve C5-6

28
Q

Action of infraspinatus?

A

External rotation of shoulder

29
Q

What is the origin of Tres Minor?

A

Lateral Border of Scapula

30
Q

What is the insertion of Tres Minor?

A

Inferior facet greater tubercle of humerus

31
Q

What is the innervation of Tres Minor?

A

Axillary nerve C5-6

32
Q

What is the action of Tres Minor?

A

External rotation of shoulder

33
Q

What is the origin of Subscapularis?

A

Subscapular fossa

34
Q

What is the insertion of Subscapularis?

A

Lesser tubercle of humerus

35
Q

What is the innervation of Subscapularis?

A

Upper and lower subscapular nerve C6-8

36
Q

What is the action of Subscapularis?

A

Internal rotation of humerus

37
Q

What is the origin of Tres Major?

A

Inferior angle of scapula

38
Q

What is the insertion of Tres Major?

A

Medial lip of intertubercular groove of humerus

39
Q

What is the innervation of Tres Major?

A

Lower subscapular nerve C6-8

40
Q

What are the actions of Tres Major?

A

Internal rotation

Adduction of the shoulder

41
Q

Origin for Pectoralis Major

A

Clavicular Head: Anterior aspect of the clavicle
Sternocostal Head: Anterior aspect of the sternum and the superior 6 costal cartilages
Abdominal Head: Aponeurosis of external oblique

42
Q

Insertion of Pectoralis Major

A

Lateral lip of the intertubercular groove of humerus

43
Q

Innervation for Pectoralis Major

A

Medial and lateral pectoral nerve C6-8

44
Q

Action for Pectoralis Major

A

Clavicular Head: Shoulder Flexion
Sternocostal Head: Should Extension
Abdominal Head: Horizontal Adduction

45
Q

Origin for Pectoralis Minor:

A

Ribs 3-5

46
Q

Insertion for Pectoralis Minor

A

Coracoid Process

47
Q

Innervation for Pectoralis Minor

A

Medial Pectoral nerve C8-T1

48
Q

Action for Pectoralis Minor

A

Scapula tipping, downward rotation, Protraction

49
Q

Origin for Serratus Anterior

A

Ribs 1-8

50
Q

Insertion for Serratus Anterior

A

Medial order of the scapula

51
Q

Innervation for Serratus Anterior:

A

Long Thoarcic Nerve C5-7

52
Q

Action for Serratus Anterior:

A

Scapular Protractiom upward rotation

53
Q

Subclavius Origin:

A

1st Rib

54
Q

Insertion for Subclavius

A

Inferior aspect of middle clavicle

55
Q

Innervation for subclavius

A

Nerve to subclavius C5-6

56
Q

Action for Subclavius

A

Aid in respiration, prevent lateral displacment of the clavicle

Anatomy (10 decks)

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