Associated Lung Muscles

Question 1

Iliocostalis Thoracis Origin

Answer 1

Upper border of ribs 6-12

Question 2

Iliocostalis Thoracis Insertion

Answer 2

Lower border of angles of 1-6

Question 3

Iliocostalis Thoracis Innervation

Answer 3

Dorsal rami of spinal nerves

Question 4

Iliocostalis Thoracis Action

Answer 4

Extension of vertebral column, erect posture, and stabilize vertebral column bilaterally
Lateral bend/rotation to same side unilaterally

Question 5

Anterior Scalene Origin

Answer 5

Transverse processes of C3-C6

Question 6

Anterior Scalene Insertion

Answer 6

Scalene tubercle of 1st rib

Question 7

Anterior Scalene Innervation

Answer 7

Anterior rami of C5, C6

Question 8

Anterior Scalene Action

Answer 8

Elevate ribs during heavy inspiration or laterally bend neck/head to one side

Question 9

Middle Scalene Origin

Answer 9

Transverse processes of C2-7

Question 10

Middle Scalene Insertion

Answer 10

1st rib posterior to subclavian artery groove

Question 11

Middle Scalene Innervation

Answer 11

Anterior rami of C3-C8

Question 12

Middle Scalene Action

Answer 12

Elevate ribs during heavy inspiration or laterally bend neck/head to one side

Question 13

Posterior Scalene Origin

Answer 13

Transverse process of C5-C7

Question 14

Posterior Scalene Insertion

Answer 14

Upper surface of 2nd rib

Question 15

Posterior Scalene Innervation

Answer 15

Anterior rami of C6-C8

Question 16

Posterior Scalene Action

Answer 16

Elevate ribs during heavy inspiration or laterally bend neck/head to one side

Question 17

Internal/External Intercostals Origin

Answer 17

Inferior border of ribs

Question 18

Internal/External Intercostals Insertion

Answer 18

Superior border of ribs

Question 19

Internal/External Intercostals Innervation

Answer 19

Intercostal nerves (T1-T11)

Question 20

Internal/External Intercostals Action

Answer 20

Fix intercostal spaces during respiration. Elevates ribs during forced expiration (External)
Fix intercostal spaces during expiration. Elevates ribs during forced inspiration. (Internal)

Question 21

Transverse Thoracic Origin

Answer 21

Lower third of inner aspect of sternum

Question 22

Transverse Thoracic Insertion

Answer 22

2nd-6th costal cartilages

Question 23

Transverse Thoracic Innervation

Answer 23

Intercostal nerves (T2-T6)

Question 24

Transverse Thoracic Action

Answer 24

Depress upper limbs

Question 25

Innermost Intercostals Origin/Insertion

Answer 25

Internal aspect of ribs

Question 26

Innermost Intercostals Innervation

Answer 26

Intercostal nerves (T1-T11)

Question 27

Innermost Intercostals Action

Answer 27

Fix intercostal spaces

Question 28

Subcostal Origin

Answer 28

Internal posterior aspect of lower 6 ribs

Question 29

Subcostal Insertion

Answer 29

Internal aspects of ribs 2-3 levels below

Question 30

Subcostal Innervation

Answer 30

Intercostal nerves

Question 31

Subcostal Action

Answer 31

Depress lower ribs

Question 32

Serratus Posterior Superior Origin

Answer 32

Nuchal ligament & spinous process of C7-T3

Question 33

Serratus Posterior Superior Insertion

Answer 33

Superior posterior border of 3-6 ribs

Question 34

Serratus Posterior Superior Innervation

Answer 34

2nd-5th intercostal nerves

Question 35

Serratus Posterior Superior Action

Answer 35

Raise ribs during inspiration

Question 36

Serratus Posterior Inferior Origin

Answer 36

Spinous process of T11-L2

Question 37

Serratus Posterior Inferior Insertion

Answer 37

Inferior posterior border of 8-12 ribs

Question 38

Serratus Posterior Inferior Innervation

Answer 38

T9-12 intercostal nerves

Question 39

Serratus Posterior Inferior Action

Answer 39

Depress ribs during expiration

Question 40

Levator Costarum Origin

Answer 40

Transverse processes of C7-T11

Question 41

Levator Costarum Insertion

Answer 41

Upper posterior edge of rib

Question 42

Levator Costarum Innervation

Answer 42

Dorsal rami of C7-T11

Question 43

Levator Costarum Action

Answer 43

Elevate ribs during inspiration

Question 44

Pec Major Origin

Answer 44

Costal margin Sternum Medial Clavicle

Question 45

Pec Major Insertion

Answer 45

Crest of greater tubercle of humerus

Question 46

Pec Major Innervation

Answer 46

Lateral & Medial pectoral nerves

Question 47

Pec Minor Origin

Answer 47

Outer surface of ribs 3-5

Question 48

Pec Minor Insertion

Answer 48

Coracoid process of scapula

Question 49

Pec Minor Innervation

Answer 49

Medial pectoral nerve

Question 50

Pec Minor Action

Answer 50

Pull scapula down and anterior | Elevate ribs if scapula fixed

Question 51

Serratus Anterior Origin

Answer 51

Upper outer surface of ribs 1-8

Question 52

Serratus Anterior Insertion

Answer 52

Medial angle Vertebral border Inferior angle of scapula

Question 53

Serratus Anterior Innervation

Answer 53

Long thoracic nerve

Question 54

Serratus Anterior Action

Answer 54

Pull scapula forward | Prevent winged scapula