Anterior/Posterior Axioappendicular Muscles

Question 1

Origin of Pectoralis Major

Answer 1

Anterior surface of medial half of clavicle and anterior surface of sternum along the superior 6 costal cartilages

Question 2

Insertion of Pectoralis Major

Answer 2

Lateral lip of intertubercular sulcus of humerus

Question 3

What does the pectoralis major do?

Answer 3

Adduction, flexion, and internal rotation

Question 4

What innervates the pectoralis major?

Answer 4

Medial and lateral pectoral nerves

Question 5

Origin of Pectoralis Minor

Answer 5

3rd – 5th Rib

Question 6

Insertion of Pectoralis Minor

Answer 6

Coracoid process

Question 7

What does the pectoralis minor do?

Answer 7

Downward rotation and anterior tilt of the scapula

Question 8

What innervates the pectoralis minor?

Answer 8

Medial pectoral nerves

Question 9

Origin of Subclavius

Answer 9

1st rib

Question 10

Insertion of Subcavius

Answer 10

Inferior clavicle

Question 11

What does the subclavius do?

Answer 11

Depress the clavicle

Question 12

What innervates the subclavius?

Answer 12

Nerve to subclavius

Question 13

Origin of serratus anterior

Answer 13

Lateral regions of ribs 1-8

Question 14

Insertion of serratus anterior

Answer 14

Anterior surface of medial border of scapula

Question 15

What does the serratus anterior do?

Answer 15

Protracts the scapula, holds it against the thoracic wall, and rotates the scapula (lower fibers = upward rotation and upper fibers = downward rotation)

Question 16

What innervates the serratus anterior?

Answer 16

Long Thoracic Nerve

Question 17

Origin of Trapezius

Answer 17

Medial third of superior nuchal line (back of neck)
External occipital protuberance
Nuchal Ligament
Spinous processes of C7 - T12 vertebrae

Question 18

Insertion of Trapezius

Answer 18

Posterior border of lateral third of clavicle
Acromion
Scapular spine

Question 19

What does the Trapezius do?

Answer 19

Upper Trapezius upward rotates and elevates the scapula
Middle Trapezius abducts/retracts the scapula
Lower Trapezius upwardly rotates and abducts

Question 20

What innervates the trapezius?

Answer 20

Spinal Accessory Nerve (CN XI)

Question 21

Origin of Latissimus Dorsi

Answer 21

Spinous processes of T7-T12
Thoracolumbar fascia
Posterior part of iliac crest
Inferior 3-4 ribs

Question 22

Insertion of Latissimus Dorsi

Answer 22

Floor of bicipital groove of humerus

Question 23

What does the latissimus dorsi do?

Answer 23

Extension, adduction, and internal rotation of humerus.

When the humerus is fixed it also raises the body towards the arm

Question 24

What innervates the latissimus dorsi?

Answer 24

Thoracodorsal nerve

Question 25

Origin of Levator Scapulae

Answer 25

Transverse processes of C1-C4

Question 26

Insertion of Levator Scapulae

Answer 26

Medial scapular border between superior angle and end of scapular spine

Question 27

What does the levator scapulae do?

Answer 27

Scapular elevation Downward rotation of the scapula Lateral flexion (if the scapula is fixed)

Question 28

What innervates the levator scapulae?

Answer 28

Dorsal scapular nerve

Question 29

Origin of Rhomboid Minor

Answer 29

Lower ligamentum nuchae | Spines of C7 and T1

Question 30

Insertion of Rhomboid Minor

Answer 30

Medial end of spine of scapula

Question 31

What does the rhomboid minor do?

Answer 31

Adduction, Downward Rotation, and Elevation

Question 32

What innervates the rhomboid minor?

Answer 32

Dorsal scapular nerve

Question 33

Origin of Rhomboid Major

Answer 33

Spines of T2-T5 vertebrae

Question 34

Insertion of Rhomboid Major

Answer 34

Medial border of scapula from spine to inferior angle

Question 35

What does the rhomboid major do?

Answer 35

Adduction Elevation Downward Rotation

Question 36

What innervates the rhomboid major?

Answer 36

Dorsal scapular nerve