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Functional Human Anatomy > Muscle Origin, Insertion, Action Shoulder Muscles > Flashcards

Muscle Origin, Insertion, Action Shoulder Muscles Flashcards

1
Q

What is the origin of the Serratus Anterior?

A

External surfaces of ribs 1-8

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2
Q

What is the insertion of the Serratus Anterior?

A

Anterior surface of medial border of scapula

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3
Q

What is the action of the Serratus Anterior

A
  • Protracts the scapula
  • Upward rotation
  • Holds scapula against thoracic wall
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4
Q

What is the origin of the Pectoralis Major?

A
  • Clavicular head - anterior surface of the medial half of the clavicle
  • Sternocostal head - anterior surface of the sternum, superior six costal cartilage
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5
Q

What is the insertion of the pectoralis major?

A
  • Lateral lip of the bicipital groove of the humerus
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6
Q

What is the actions of the pectoralis major?

A

Humerus
- Adduction
- Medial rotation
- Clavicular head flexes arm
- Sternocostal head will extend the humerus from flexed position

Scapula
- Draws scapula anteriorly and inferiorly

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7
Q

What is the origin of the Pectoralis minor?

A

Anterior surface of ribs 3 to 5

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8
Q

What is the insertion of the pectoralis minor?

A

Coracoid process of the scapula

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9
Q

What are the actions of the Pectoralis Minor?

A

Scapula
- Depression
- Protraction
- Anchors

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10
Q

What is the origin of the superior fibers of Trapezius?

A
  • Occipital protuberance
  • Spinous processes of C7
  • Superior nuchal line
  • Ligamentum nuchae
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11
Q

What is the insertion of the superior fibers of Trapezius?

A

Clavicle
- Lateral 1/3

Scapula
- Acromion process

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12
Q

What is the action of the superior fibers of the Trapezius?

A
  • Elevates scapula
  • Upward rotation of scapula
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13
Q

What is the origin of the middle fibers of the Trapezius?

A

Spinous processes of T1 to T5

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14
Q

What is the insertion of the middle fibers of the Trapezius?

A
  • Medial margin of the acromion process
  • Superior lip of spine of scapula
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15
Q

What is the action of the middle fibers of the Trapezius?

A

Scapula retraction

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16
Q

What is the origin of the inferior fibers of the Trapezius?

A

Spinus processes of T6 to T12

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17
Q

What is the insertion of the inferior fibers of the Trapezius?

A

Tubercle of the apex of the spine of the scapula

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18
Q

What is the action of the inferior fibers of the Trapezius?

A
  • Scapula depression
  • Upward rotation of the scapula
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19
Q

What is the origin of the Rhomboid minor?

A
  • Spinous processes of C7 and T1
  • Ligamentum nuchae
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20
Q

What is the insertion of the Rhomboid minor?

A
  • Medial border of scapula at root of spine
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21
Q

What is the action of Rhomboid minor?

A
  • Scapula retraction
  • Downward rotation of scapula
22
Q

What is the origin of the Rhomboid major?

A

Spinous processes of T2 to T5

23
Q

What is the insertion of the Rhomboid major?

A

Medial border of the scapula between spine and inferior angle

24
Q

What is the action of the Rhomboid major?

A
  • Scapula retraction
  • Downward rotation of scapula
25
Q

What is the origin of the Levator Scapulae?

A

Transverse processes of C1 to C4

26
Q

What is the insertion of the Levator Scapulae?

A

Superior Medial Border of scapula

27
Q

What is the action of the Levator Scapulae?

A
  • Scapula elevation
  • downward rotation of scapula
  • Assists with lateral flexion of cervical spine
28
Q

What is the origin of the deltoid?

A
  • Lateral 1/3 of clavicle - anterior border and upper surface
  • Acromion
  • Spine of scapula
29
Q

Where is the insertion of the Deltiod

A

Deltoid tuberosity of the humerus

30
Q

What is the action of the Deltoid?

A

Abduction - medial fibers
Flexion - anterior fibers
Extension - posterior fibers

31
Q

What is the origin of the Coracobrachialis?

A

Tip of the coracoid process of scapula

32
Q

Where is the insertion of the Coracobrachialis?

A

Middle 1/3 of the medial surface of the humerus

33
Q

What is the action of the Coracobrachialis?

A

Flexes and adducts shoulder joint

34
Q

What is the origin of the Latissimus Dorsi?

A
  • Spinous processes of T6 to T12
  • Thoracolumbar fascia
  • Iliac Crest
  • Ribs 8 to 12
35
Q

Where is the insertion of Latissimus Dorsi?

A

Floor of the bicipital groove

36
Q

What is the action of the Latissimus Dorsi? (3)

A

Humerus
- Extends
- Adducts
- Medially rotates

Raises body towards arms during climbing

37
Q

What is the origin of the Teres Major?

A

Posterior aspect of inferior angle of scapula

38
Q

Where does the Teres Major insert?

A

Medial lip of bicipital groove

39
Q

What are the actions of the Teres Major?

A
  • Adduction of shoulder joint
  • Medial rotation of the shoulder joint
  • Extend shoulder from flexed position
40
Q

What is the origin of the Infraspinatus?

A

Infraspinatus Fossa

41
Q

Where does the infraspinatus insert?

A

Middle facet of greater tubercle of humerus

42
Q

What is the action of the Infraspinatus?

A

-Laterally rotates arm

-Acts with rotator cuff muscles to hold humerus in glenoid cavity

43
Q

What is the origin of the Teres Minor

A

Middle part of lateral border of scapula

44
Q

Where is the insertion of the Teres Minor?

A

Inferior facet of greater tubercle of humerus

45
Q

What are the actions of the Teres Minor

A
  • Laterally rotate arms

-Acts with rotator cuff muscles to hold humerus in glenoid cavity

46
Q

What is the origin of the Subscapularis?

A

Subscapular fossa

47
Q

Where is the insertion of the Subscapularis?

A

Lesser tubercle of the humerus

48
Q

What is the action of the Subscapularis?

A
  • Medially rotates the arm
  • Acts with rotator cuff muscles to hold humerus in glenoid cavity
49
Q

What is the origin of the Supraspinatus?

A

Supraspinatus fossa

50
Q

Where is the insertion of the Supraspinatus?

A

Superior facet of greater tubercle of humerus

51
Q

What is the action of the Supraspinatus?

A
  • Initiates and assists deltoid in abduction

-Acts with rotator cuff muscles to hold humerus in glenoid cavity

Functional Human Anatomy (6 decks)

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