SUBCLAVIAN ARTERY
Origin.
Right side : Arises from the brachiocephalic trunk, a branch of the aortic arch.
Left side : Arises directly from the aortic arch.
Course:
The subclavian artery runs beneath the clavicle, passing from the thorax into the axilla and then into the upper limb.
S: post. part of the brain, anterior and lateral thoracic walls, anterior abdominal wall & Upper extremity
- ant. " " supplied by internal carotid..
Divisions : The subclavian artery is divide into 3 parts based on its relation to the anterior scalene muscle.
- 1. Medial to ant. scalene
- 2. Posterior " " "
- 3. Lateral " " "
Subclavian artery
- 1st part
- Vertebral artery
- Ascends through the Transverse foramina (C₆-C₁) of cervical vertebrae
- enter foramen magnum
- S: post. part of the brain.
- Internal thoracic art.
- Descends along the sternum
- S: anterior chest wall & the breasts.
- Anterior intercostal art.
- 2 arteries in each intercostal space.
- They are 9 pairs on each side
- only 1-6 pairs from the internal thoracic art.
- 7th rib
- musculophrenic artery
- Superior epigastric artery.
- Thyrocervical trunk
- I Saw Ten Ants
- Inferior thyroid Art — S: thyroid gland & surrounding Structures.
- Suprascapular artery — S: supra/infra spinatus muscles.
- Transverse cervical artery — S: Trapezius muscle
- Ascending cervical art. — S: deep cervical muscles.
- 2nd part
- Costocervical trunk.
- Superior intercostal art. — Only 1st & 2nd intercostal art.
- Deep cervical artery