Intercoastal Muscles Flashcards
What are the three layers of intercostal muscles?
External intercostal muscles
Internal intercostal muscles
Innermost intercostal muscle
The external intercostal muscles aid in what?
Quiet and forced inhalation
Where does the external intercostal muscle originate?
Ribs 1- 11
Where does the external intercostal muscle have their insertion ?
Ribs 2 - 12
the external intercostal muscle is responsible for what?
The elevation of the ribs, and expanding the transverse dimensions of the thoracic cavity
The internal intercostal muscles aid in what?
Forced expiration
The internal intercostal muscles originate on?
Ribs 2 - 12
The internal intercostal muscles have then insertions on?
Ribs 1-11
The internal intercostal muscles are responsible for what?
Depression of the ribs decreasing the transverse dimensions of the thoracic cavity
What are the innermost intercostal muscle?
The deep layers of the internal intercostal muscles which are separated from them by a neurovascular bundle
What is the innermost intercostal muscle composed of?
Transverse thoracis muscle
Intercostal space
Subcostalis muscle
