Thoracic Wall Flashcards
1
Q
Serratus Posterior Superior
A
Origin: spinous processes of C7-T3
Insertion: posterior surface of ribs 2-5
Action: elevate ribs during inhalation
Nerve: intercostal nerves T1-T4
2
Q
Serratus Posterior Inferior
A
Origin: spinous processes of T12-L3
Insertion: posterior surface of ribs 9-12
Action: depress ribs during inhalation
Nerve: intercostal nerves T9-T12
3
Q
External Intercostals
A
Origin: inferior border of rib above
Insertion: superior border of rib below
Action: draw ribs superiorly to assist with inhalation
Nerve: thoracic nerves
4
Q
Internal Intercostals
A
Origin: inferior order of rib above
Insertion: superior border of rib below
Action: draw ribs superiorly to assist with exhalation
Nerve: thoracic nerves
