Associated Lung Muscles Flashcards
Iliocostalis Thoracis Origin
Upper border of ribs 6-12
Iliocostalis Thoracis Insertion
Lower border of angles of 1-6
Iliocostalis Thoracis Innervation
Dorsal rami of spinal nerves
Iliocostalis Thoracis Action
Extension of vertebral column, erect posture, and stabilize vertebral column bilaterally
Lateral bend/rotation to same side unilaterally
Anterior Scalene Origin
Transverse processes of C3-C6
Anterior Scalene Insertion
Scalene tubercle of 1st rib
Anterior Scalene Innervation
Anterior rami of C5, C6
Anterior Scalene Action
Elevate ribs during heavy inspiration or laterally bend neck/head to one side
Middle Scalene Origin
Transverse processes of C2-7
Middle Scalene Insertion
1st rib posterior to subclavian artery groove
Middle Scalene Innervation
Anterior rami of C3-C8
Middle Scalene Action
Elevate ribs during heavy inspiration or laterally bend neck/head to one side
Posterior Scalene Origin
Transverse process of C5-C7
Posterior Scalene Insertion
Upper surface of 2nd rib
Posterior Scalene Innervation
Anterior rami of C6-C8
Posterior Scalene Action
Elevate ribs during heavy inspiration or laterally bend neck/head to one side
Internal/External Intercostals Origin
Inferior border of ribs
Internal/External Intercostals Insertion
Superior border of ribs
Internal/External Intercostals Innervation
Intercostal nerves (T1-T11)
Internal/External Intercostals Action
Fix intercostal spaces during respiration. Elevates ribs during forced expiration (External)
Fix intercostal spaces during expiration. Elevates ribs during forced inspiration. (Internal)
Transverse Thoracic Origin
Lower third of inner aspect of sternum