Trunk vessels (aorta, vena cava, abdominal branches)
First posterior intercostal arteries
Arteriae intercostales posteriores primae
- Origin
- Branch of the supreme intercostal artery
- Insertion
- Courses in the costal groove of the 1st rib within the neurovascular bundle (VAN: vein, artery, nerve)
- Function
- Supplies the muscles and parietal pleura of the 1st intercostal space
- Innervation
- 1st intercostal nerve
- Movement & chain
- Arterial pulsatile flow
- Palpation
- Not palpated directly
- Clinical
- Vascular complications associated with first rib fractures or thoracic outlet syndrome (TOS).
- Segmental innervation
- T1 spinal level
- In clinical practice
- Neurovascular assessment of upper limb in first rib trauma
- Region in the model
- Trunk vessels (aorta, vena cava, abdominal branches)