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A&P > Muscle Attachments and Insertions-Lab Practical 2 > Flashcards

Muscle Attachments and Insertions-Lab Practical 2 Flashcards

1
Q

2 points of attachment

A
  1. Origin: Doesn’t move when a muscle contracts

2. Insertion: Moves when a muscle contracts

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2
Q

Levator scapulae origin

A

Vertebrae C1-C4

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3
Q

Levator scapulae insertion

A

Vertebral border of scapula

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4
Q

Levator scapulae action

A

Elevates scapula

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5
Q

Pectoralis minor origin

A

Ribs 3-5

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6
Q

Pectoralis minor insertion

A

Coracoid process of scapula

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7
Q

Pectoralis minor actions

A
  1. When ribs are fixed it pulls the scapula downward and forward
  2. Assists in inspiration when the scapula is fixed
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8
Q

Rhomboid minor origin

A

Vertebrae C7-TI😁

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9
Q

Rhomboid minor insertion

A

Medial border of the scapula

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10
Q

Rhomboid minor action

A

Adducts the scapula

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11
Q

Rhomboid major origin

A

Vertebrae T1 and T5

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12
Q

Rhomboid major insertion

A

Medial scapula border

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13
Q

Rhomboid major action

A

Adducts the scapula

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14
Q

Subclavius origin

A

Superior border of rib 1

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15
Q

Subclavius insertion

A

Inferior border of clavicle

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16
Q

Subclavius action

A

Depresses the clavicle

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17
Q

Serratus anterior origin

A

Ribs 1-9

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18
Q

Serratus anterior insertion

A

Medial border of scapula

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19
Q

Serratus anterior actions

A

Scapula fixator

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20
Q

Trapezius origin

A

Nuchal ligament of the occipital bone

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21
Q

Trapezius insertion

A

The clavicle, scapular spine, and acromion of the scapula

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22
Q

Trapezius actions

A
  1. Contraction of all fibers adducts the scapula
  2. Contraction of upper fibers elevates the scapula
  3. Contraction of lower fibers depresses the scapula
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23
Q

Deltoid origin

A

Scapular spine and acromial end of clavicle

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24
Q

Deltoid insertion

A

Deltoid tuberosity of humerus

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25
Q

Deltoid action

A

Abduction of arm at shoulder

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26
Q

Supraspinatus origin

A

Supraspinous fossa

27
Q

Supraspinatus insertion

A

Greater tubercle of humerus

28
Q

Supraspinatus action

A

Abduction of arm at shoulder

29
Q

Subscapularis origin

A

Subscapular fossa of scapula

30
Q

Subscaoularis insertion

A

Lesser tubercle of humerus

31
Q

Subscapularis action

A

Medial rotation of arm at shoulder

32
Q

Teres major origin

A

Inferior angle of scapula

33
Q

Teres major insertion

A

Intertubercular sulcus of humerus

34
Q

Teres major action

A

Adduction and medial rotation at the shoulder

35
Q

Infraspinatus origin

A

Infraspinous fossa

36
Q

Infraspinatus insertion

A

Greater tubercle of humerus

37
Q

Infraspinatus action

A

Lateral rotation

38
Q

Teres minor origin

A

Lateral border of scapula

39
Q

Teres minor insertion

A

Greater tubercle below insertion of infraspinatus

40
Q

Teres minor action

A

Lateral rotation of arm at the shoulder

41
Q

Pectoralis major origin

A

Clavicle, sternum, and ribs 1-6

42
Q

Pectoralis major insertion

A

Intertubercular sulcus of humerus

43
Q

Pectoralis major action

A
  1. Adduction
  2. Medial rotation
  3. Flexion at the shoulder
44
Q

Triceps brachii origin

A

Lateral head- superior region of humerus
Long head- infraglenoid tubercle
Medial head- posterior region of humerus

45
Q

Triceps brachii insertion

A

Olecranon process of the ulna

46
Q

Triceps brachii action

A

Extension at elbow

47
Q

Latissimus dorsi origin

A

Ribs 8-12, vertebrae T7-L5

48
Q

Latissimus dorsi insertion

A

Intertubercular groove of humerus

49
Q

Latissimus dorsi action

A
  1. Extension
  2. Adduction
  3. Medial rotation of the arm
50
Q

Biceps brachii origin

A

Short head- coracoid process of the scapula

Long head- supraglenoid tubercle of scapula

51
Q

Biceps brachii insertion

A

Radial tuberosity

52
Q

Biceps brachii action

A

Flexion of arm at elbow, supination of forearm

53
Q

Brachialis origin

A

Anterior distal surface of humerus

54
Q

Brachialis insertion

A

Coronoid process of ulna

55
Q

Brachialis action

A

Major flexor at elbow

56
Q

Brachioradialis origin

A

Lateral epicondyle of the humerus

57
Q

Brachioradialis insertion]

A

Radial styloid process

58
Q

Brachioradialis action

A

Flexion of arm at elbow, supination of forearm

59
Q

Pronator teres origin

A

Medial epicondyle of the humerus and the coronoid process of the ulna

60
Q

Pronator teres insertion

A

Mid-lateral surface of the radius

61
Q

Pronator teres action

A

Pronation of forearm

62
Q

Pronator quadrates origin

A

Anterior and medial surfaces of distal ulna

63
Q

Pronator quadrates insertion

A

Anterolateral surfaces of distal radius

64
Q

Pronator quadrates action

A

Pronation of forearm

A&P (13 decks)

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