Muscles of Thoracic Wall Flashcards
Where does the external intercostal insert?
Superior border of the ribs below
What is the origin of the external intercostal?
Inferior border of ribs
What is the innervation of the external intercostal?
Intercostal nerve
What action does the external intercostal nerve perform?
Elevate ribs during forced respiration
What is the origin of the internal intercostal?
Inferior border of ribs
Where does the internal intercostal insert?
Superior border of the ribs below
What is the innervation of the internal intercostal?
Intercostal nerve
What action does the internal intercostal perform?
During forced respiration, the interosseous part depresses ribs and the interchondral part elevates ribs
What is the origin of the innermost intercostal?
Inferior border of ribs
Where does the innermost intercostal insert?
Superior border of the ribs below
What is the innervation of the innermost intercostal?
Intercostal nerve
What action does the innermost intercostal perform?
During forced respiration, the interosseous part depresses the ribs and the interchondral part elevates the ribs
What is the origin of the transversus thoracis?
Posterior surface of lower sternum
Where does the transversus thoracis insert?
Internal surfaces of costal cartilages 2-6
What is the innervation of the transversus thoracis?
Intercostal nerve
