Anatomy Lab: Insertion/Origin/Innervation/Action

Question 1

What is the origin and insertion of the descending part of trapezius?

Answer 1

Originates from the external occipital protuberance, the ligamentum nuchae, and spinous processes of C1-C7

Inserts into the lateral third of the clavicle

Question 2

What is the origin and insertion of the transverse part of the trapezius?

Answer 2

Originates from the aponeuroses at the spinous processes of T1-T4

Inserts into the acromion

Question 3

What is the origin and insertion of the ascending part of the trapezius?

Answer 3

Originates from the spinous processes of T5 to T12

Inserts onto the scapular spine

Question 4

What is the innervation of the trapezius?

Answer 4

Innervated by Accessory nerve CN XI and Cervical plexus C3-C4

Question 5

What is the action of the descending part of the trapezius?

Answer 5

Draws scapula obliquely upward, rotates glenoid cavity superiorly, tilts head to same side, and rotates head to opposite side

Question 6

What is the action of the transverse part of the trapezius?

Answer 6

Draws scapula medially

Question 7

What is the action of the ascending part of the trapezius?

Answer 7

Draws scapula medially downward

Question 8

As a whole, acts to steady the scapula on the thorax

Answer 8

Trapezius

Question 9

What is the origin and insertion of the levator scapulae?

Answer 9

Originates at the transverse process of C1-C4

Inserts at the scapula (superior angle)

Question 10

What is the action of the levator scapulae?

Answer 10

Draws scapula medially upward while moving inferior angle medially and bends neck to same side

Question 11

What is the origin and insertion of the rhomboid minor?

Answer 11

Originates at the spinous process of C6 and C7

Inserts at the medial border of the scapula, above the scapular spine

Question 12

What is the origin and insertion of the rhomboid major?

Answer 12

Originates at the spinnous process of T1-T4

Inserts at the medial border of the scapula below the scapular spine

Question 13

The levator scapulae, rhomboid major, and rhomboid minor are all innervated by the

Answer 13

Innervated by Dorsal scapular nerve (C4-C5)

Question 14

What is the action of the rhomboid major and minor?

Answer 14

Steadies scapula and draws the scapula medially upward

Question 15

What is the origin of the vertebral part of the latissimus dorsi?

Answer 15

Originates from the spinous processes or T7-T12 and the thoracolumbar fascia

Question 16

What is the origin of the scapular part of the Latissimus Dorsi?

Answer 16

Originates from the inferior angle of the scapula

Question 17

What is the origin of the the costal part of the Latissimus Dorsi?

Answer 17

Originates from ribs 9-12

Question 18

What is the origin of the Iliac part of the Latissimus Dorsi?

Answer 18

Originates from the posterior third of the iliac crest

Question 19

All parts of the Latissimus Dorsi insert on the

Answer 19

Insert to the Crest of the lesser tuberosity of the humerus

Question 20

What is the innervation of all parts of the Latissimus Dorsi?

Answer 20

Innervated by thoracodorsal nerve (C6-C8)

Question 21

What is the action of all parts of the Latissimus Dorsi?

Answer 21

Internal rotation, adduction, and extension of the upper limb, and respeiration (cough muscle)

Question 22

What is the origin and insertion of the Teres Major?

Answer 22

Originates from the inferior angle of the scapula

Inserts at the crest of lesser tuberosity of humerus

Question 23

What is the innervation of the Teres major?

Answer 23

Innervated by Lower subscapular nerve (C5-C7)

Question 24

What is the action of the teres major?

Answer 24

Internally rotates, adducts, and extends the upper limb

Question 25

What is the origin and insertion of the Semispinalis Capitis?

Answer 25

Originates from the transverse and articular processes of C4-T7 Inserts onto the occipital bone between the superior and inferior nuchal lines

Question 26

What is the innervation of the Semispinalis Capitis?

Answer 26

Innervated by spinal nerves (posterior rami)

Question 27

What is the action of the Semispinalis Capitis?

Answer 27

Acts BILATERALLY to extend thoracic and cervical spines and head, as well as stabilizing craniovertebral joints Acts UNILATERALLY to bend the head and cervical/thoracis spines to the same side and rotate them to opposite sides

Question 28

What is the origin and insertion of the Splenius Capitis?

Answer 28

Originates from the ligamentum nuchae and the spinous processes of C7-T3 Inserts onto the lateral superior nuchal line of occipital bone and the mastoid process of temporal bone

Question 29

What is the innervation of the Splenius Capitis

Answer 29

Innervated by spinal nerve (C1-C6) (posterior rami, lateral branches)

Question 30

What is the action of the Splenius Capitis?

Answer 30

BILATERALLY acts to extend cervical spine and head UNILATERALLY acts to flex and rotate the head to the same side

Question 31

What is the origin of the pectoralis major?

Answer 31

Originates at the medial clavicle (clavicular), sternum and cartilage of ribs 1-6 (sternocostal), and the anterior layer of rectus sheath (abdominal part)

Question 32

What is the insertion of the pectoralis major?

Answer 32

Inserts at the crest of the greater tuberosity of humerus

Question 33

What is the action of ALL fibers of the pectoralis major?

Answer 33

Act to adduct and medially rotate the shoulder

Question 34

What is the action of the clavicular and sternocostal parts of the pectoralis major?

Answer 34

Act to flex the arm at the shoulder and assist in respiration when shoulder is fixed

Question 35

The pectoralis major is innervated by?

Answer 35

Innervated by the lateral and medial pectoral nerve (C6, 7, 8 T1)

Question 36

What is the origin of the pectoralis minor?

Answer 36

Originates from ribs 3-5

Question 37

What is the insertion of the pectoralis minor?

Answer 37

Inserts the medial surface of coracoid process of the scapula

Question 38

What is the action of the pectoralis minor?

Answer 38

Acts to depress, abduct, and downwardly rotate the scapula

Question 39

With the scapula fixed, the pectoralis minor acts to

Answer 39

With the scapula fixed, acts to assist to elevate the thorax during forced inhalation

Question 40

The pectoralis minor is innervated by

Answer 40

Medial pectoral nerve (C8-T1)

Question 41

The clavicular part of the deltoid originates from

Answer 41

Originates from the lateral 1/3 of the clavicle

Question 42

The acromial part of the deltoid originates from

Answer 42

Originates from the acromion

Question 43

The spinal part of the deltoid originated from the

Answer 43

Originates from the scapular spine

Question 44

All parts of the deltoid insert onto the

Answer 44

Insert onto the deltoid tuberosity of the humerus

Question 45

The deltoid is innervated by

Answer 45

Innervated by the axillary nerve (C5-C6)

Question 46

The clavicular part of the deltoid acts to

Answer 46

Acts to flex, internally rotate, and adduct the arm at the shoulder

Question 47

The acromial part of the deltoid acts to

Answer 47

Acts to abduct the arm at the shoulder

Question 48

The spinal part of the deltoid acts to

Answer 48

Acts to extend, externally rotate, and adduct the arm at the shoulder

Question 49

Between 60 and 90 degrees of abduction, the clavicular and spinal parts of the deltoid assist the accromial part with

Answer 49

Abduction

Question 50

The subscapularis originates from

Answer 50

Originates from the subscapular fossa

Question 51

The subscapularis inserts onto the

Answer 51

Inserts onto the lesser tuberosity of the humerus

Question 52

The subscapularis is innervated by

Answer 52

Innervated by the subscapular nerve (C5, C6)

Question 53

What is the action of the subscapularis?

Answer 53

Acts to internally rotate the arm at the shoulder joint

Question 54

The serratus anterior originates from the

Answer 54

Originates from the 1st to 9th ribs

Question 55

The serratus anterior inserts onto the

Answer 55

Inserts onto the medial border of the scapula

Question 56

The serratus anterior is innervated by

Answer 56

Innervated by the long thoracic nerve (C5, C7)

Question 57

What is the action of the superior part of the serratus anterior?

Answer 57

Acts to lower a raised arm

Question 58

What is the action of the inferior part of the serratus anterior?

Answer 58

Acts to rotate the scapula laterally

Question 59

What is the action of the intermediate part of the serratus anterior?

Answer 59

Acts with the entire muscle to draw the scapula laterally forward and elevate the ribs when the shoulder is fixed

Question 60

The long head of the biceps brachii originates from the

Answer 60

Originates from the supraglenoid tubercle of the scapula

Question 61

The short head of the biceps brachii originates from the

Answer 61

Originates from the coracoid process of the scapula

Question 62

Both heads of the biceps brachi insert onto the

Answer 62

Insert onto the radial tuberosity via the common tendon and the bicipital aponeurosis of the cubital fossa

Question 63

Both heads of the biceps brachii are innervated by

Answer 63

Innervated by the musculocutaneous nerve (C5 to C6)

Question 64

Both the long and short heads of the biceps brachii act to

Answer 64

Act to flex the elbow and supinate the forearm Also to flex, abduct, and internally rotate the arm at the shoulder

Question 65

The coracobrachialis originates on the

Answer 65

Originates on the coracoid process of the scapula

Question 66

The coracobrachialis inserts onto the

Answer 66

Inserts onto the humerus in line with the crest of the lesser tuberosity

Question 67

The corocobrachiallus is innervated by the

Answer 67

Innervated by the musculocutaneous nerve (C5-C7)

Question 68

The corocobrachiallis acts to

Answer 68

Acts to flex, adduct, and internally rotate the arm at the shoulder

Question 69

The brachiallis originates from the

Answer 69

Originates from the anterior surface of the distal half of the humerus

Question 70

The brachiallis crosses the elbow and inserts onto the

Answer 70

Crosses the elbow and inserts onto the ulnar tuberosity

Question 71

The brachialis is innervated by

Answer 71

Innervated by the musculocutaneous nerve (C5,C6) and the radial nerve (C7)

Question 72

The brachialis acts to

Answer 72

Acts to flex the elbow joint

Question 73

The teres minor originates from the

Answer 73

Originates from the lateral border of the scapula

Question 74

The teres minor inserts onto the

Answer 74

Inserts onto the greater tuberosity of the humerus

Question 75

The teres minor is innervated by the

Answer 75

Innervated by the axillary nerve (C5, C6)

Question 76

The teres minor acts to

Answer 76

Acts to externally rotate the arm and weakly adduct the arm at the shoulder

Question 77

The long head of the triceps brachii originates from the

Answer 77

Originates from the infraglenoid tubercle of the scapula

Question 78

The long head of the triceps inserts onto the

Answer 78

Inserts onto the olecranon of the ulna

Question 79

The triceps brachii is innervated by

Answer 79

Innervated by the Radial nerve (C6-C8)

Question 80

The long head of the triceps brachii acts to

Answer 80

Acts to extend the forearm at the elbow joint and adduct the arm at the shoulder joint

Question 81

The supraspinatus originates from the

Answer 81

Originates from the supraspinous fossa of the scapula

Question 82

The supraspinatus inserts onto the

Answer 82

Inserts onto the greater tuberosity of the humerus

Question 83

The supraspinatus is innervated by

Answer 83

Innervated by the suprascapular nerve (C4 to C6)

Question 84

The supraspinatus acts to

Answer 84

Acts to abduct the arm at the shoulder joint

Question 85

The infraspinatus origintes from the

Answer 85

Originates from the infraspinatous fossa of the scapula

Question 86

The infraspinatus inserts onto the

Answer 86

Inserts onto the greater tuberosity of the humerus

Question 87

The infraspinatus is innervated by

Answer 87

Innervated by the suprascapular nerve (C4 to C6)

Question 88

What are the boundaries of the scapular notch?

Answer 88

Superior transverse scapular ligament and the scapula

Question 89

What are the boundaries of the medial border of the scapula?

Answer 89

The scapula

Question 90

What are the boundaries of the triangular space?

Answer 90

The teres major and minor

Question 91

What are the boundaries of the triceps hiatus?

Answer 91

Triceps brachi, humerus, and teres major

Question 92

What are the boundaries of the quadrangular space?

Answer 92

Teres major and minor, triceps brachii, and the humerus