Thoracic Wall Flashcards
Ant Scalene INSERTION
1st rib (ant. scalene tubercle)
Ant. Scalene ACTION
Raise upper ribs during inspiration
Middle scalene ORIGIN
Post. tubercle of T.P C3-C7
Middle Scalene INSERTION
1st rib (post. to groove for subclavian A)
Scalene’s ACTION
RAISE UPPER RIBS DURING INSPIRATION
Post. Scalene ORIGIN
Post. tubercle of T.P C5-C7
Post. Scalene INSERTION
2nd rib (outer surface)
SCALENE INNERVATION
C3-C6
External Intercostal ORIGIN
lower margin of rib to upper margin of next lower rib
courses obliquely foward and downward from costal tubercle to chondro-osseous junction
INTERCOSTAL INSERTION
ALL
1ST-11h intercostal N
External Intercostal Action
raise during inspiration
Internal/Innermost Intercostal ORIGIN
Lower margin of rib to upper margin of next lowe rib
courses obliquely forward and upward from costal angle to sternum
Internal/Innermost intercostal ACTION
EXPIRATION
Transversus thoracic ORIGIN
Sternum & xiphoid process (inner surface)
Transversus thoracic INSERTION
2ND - 6TH RIBS ( COSTAL CARTILAGE)
