Muscle Attachments and Insertions-Lab Practical 2

Question 1

2 points of attachment

Answer 1

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

2. Insertion: Moves when a muscle contracts

Question 2

Levator scapulae origin

Answer 2

Vertebrae C1-C4

Question 3

Levator scapulae insertion

Answer 3

Vertebral border of scapula

Question 4

Levator scapulae action

Answer 4

Elevates scapula

Question 5

Pectoralis minor origin

Answer 5

Ribs 3-5

Question 6

Pectoralis minor insertion

Answer 6

Coracoid process of scapula

Question 7

Pectoralis minor actions

Answer 7

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

Question 8

Rhomboid minor origin

Answer 8

Vertebrae C7-TI😁

Question 9

Rhomboid minor insertion

Answer 9

Medial border of the scapula

Question 10

Rhomboid minor action

Answer 10

Adducts the scapula

Question 11

Rhomboid major origin

Answer 11

Vertebrae T1 and T5

Question 12

Rhomboid major insertion

Answer 12

Medial scapula border

Question 13

Rhomboid major action

Answer 13

Adducts the scapula

Question 14

Subclavius origin

Answer 14

Superior border of rib 1

Question 15

Subclavius insertion

Answer 15

Inferior border of clavicle

Question 16

Subclavius action

Answer 16

Depresses the clavicle

Question 17

Serratus anterior origin

Answer 17

Ribs 1-9

Question 18

Serratus anterior insertion

Answer 18

Medial border of scapula

Question 19

Serratus anterior actions

Answer 19

Scapula fixator

Question 20

Trapezius origin

Answer 20

Nuchal ligament of the occipital bone

Question 21

Trapezius insertion

Answer 21

The clavicle, scapular spine, and acromion of the scapula

Question 22

Trapezius actions

Answer 22

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

Question 23

Deltoid origin

Answer 23

Scapular spine and acromial end of clavicle

Question 24

Deltoid insertion

Answer 24

Deltoid tuberosity of humerus

Question 25

Deltoid action

Answer 25

Abduction of arm at shoulder

Question 26

Supraspinatus origin

Answer 26

Supraspinous fossa

Question 27

Supraspinatus insertion

Answer 27

Greater tubercle of humerus

Question 28

Supraspinatus action

Answer 28

Abduction of arm at shoulder

Question 29

Subscapularis origin

Answer 29

Subscapular fossa of scapula

Question 30

Subscaoularis insertion

Answer 30

Lesser tubercle of humerus

Question 31

Subscapularis action

Answer 31

Medial rotation of arm at shoulder

Question 32

Teres major origin

Answer 32

Inferior angle of scapula

Question 33

Teres major insertion

Answer 33

Intertubercular sulcus of humerus

Question 34

Teres major action

Answer 34

Adduction and medial rotation at the shoulder

Question 35

Infraspinatus origin

Answer 35

Infraspinous fossa

Question 36

Infraspinatus insertion

Answer 36

Greater tubercle of humerus

Question 37

Infraspinatus action

Answer 37

Lateral rotation

Question 38

Teres minor origin

Answer 38

Lateral border of scapula

Question 39

Teres minor insertion

Answer 39

Greater tubercle below insertion of infraspinatus

Question 40

Teres minor action

Answer 40

Lateral rotation of arm at the shoulder

Question 41

Pectoralis major origin

Answer 41

Clavicle, sternum, and ribs 1-6

Question 42

Pectoralis major insertion

Answer 42

Intertubercular sulcus of humerus

Question 43

Pectoralis major action

Answer 43

1. Adduction 2. Medial rotation 3. Flexion at the shoulder

Question 44

Triceps brachii origin

Answer 44

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

Question 45

Triceps brachii insertion

Answer 45

Olecranon process of the ulna

Question 46

Triceps brachii action

Answer 46

Extension at elbow

Question 47

Latissimus dorsi origin

Answer 47

Ribs 8-12, vertebrae T7-L5

Question 48

Latissimus dorsi insertion

Answer 48

Intertubercular groove of humerus

Question 49

Latissimus dorsi action

Answer 49

1. Extension 2. Adduction 3. Medial rotation of the arm

Question 50

Biceps brachii origin

Answer 50

Short head- coracoid process of the scapula | Long head- supraglenoid tubercle of scapula

Question 51

Biceps brachii insertion

Answer 51

Radial tuberosity

Question 52

Biceps brachii action

Answer 52

Flexion of arm at elbow, supination of forearm

Question 53

Brachialis origin

Answer 53

Anterior distal surface of humerus

Question 54

Brachialis insertion

Answer 54

Coronoid process of ulna

Question 55

Brachialis action

Answer 55

Major flexor at elbow

Question 56

Brachioradialis origin

Answer 56

Lateral epicondyle of the humerus

Question 57

Brachioradialis insertion]

Answer 57

Radial styloid process

Question 58

Brachioradialis action

Answer 58

Flexion of arm at elbow, supination of forearm

Question 59

Pronator teres origin

Answer 59

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

Question 60

Pronator teres insertion

Answer 60

Mid-lateral surface of the radius

Question 61

Pronator teres action

Answer 61

Pronation of forearm

Question 62

Pronator quadrates origin

Answer 62

Anterior and medial surfaces of distal ulna

Question 63

Pronator quadrates insertion

Answer 63

Anterolateral surfaces of distal radius

Question 64

Pronator quadrates action

Answer 64

Pronation of forearm