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
- Vertebral artery (1st part)
- Ascends through the Transverse foramina (C₆-C₁) of cervical vertebrae
- enter foramen magnum
- S: post. part of the brain.
- Internal thoracic art. (1st part)
- Descends along the sternum
- S: anterior chest wall & the brests.
- Anterior intercostal art.
- 2 artries in each intercostal space.
- They are 9 pairs on each side
- * only 1-6 pairs from the internal thoracic art.
- 7th rib
- musculphrenic 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.
- Costocervical trunk. (2ed part)
- Superior intercostal art. Only 1st & 2ed intercostal art.
- Deep cervical artery