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SCALENUS ANTERIOR-MEDIAL RELATIONS

Anatomy-Neck

SCALENUS ANTERIOR-MEDIAL RELATIONS

MUSCLES
1. Longus colli - the edge of the longus colli runs up to the anterior tubercle of C6 and together with the medial border of the SA makes a pyramidal space, whose base is the SCA + neck of first rib. The apex of this pyramid is the C6 TP (carotid tubercle of Chassaignac).

GANGLIA & NERVES
2. Stellate ganglion, vertebral artery + vein - lie within this pyramidal space.
3. Ansa subclavia - connecting loop b/w the middle and inferior cervical ganglia.

ARTERIES
4. Vertebral artery - first branch of SCA, passes up medial to SA and into the C6 transverse foramen.
5. Inferior thyroid artery - arches medial to SA.
6. First part of SCA - arches medially over the suprapleural membrane, to disappear medially and behind the SA.
7. Thyrocervical trunk - arises lateral to the VA from the subclavian.
8. Internal thoracic artery - arises from the SCA, passes down over the lung apex, crossing the phrenic nerve.

VEIN
9. Vertebral vein - emerges from C6 transverse foramina, passes down over the lung apex, empties into the BCV.

LYMPHATICS
10. Thoracic duct (left) + lymphatic duct (right) arch medially over the lung apex, then anterior to the SA to enter the confluence of the IJV + SCV.



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REFERENCES

1. Mcminn. (2003). Last's Anatomy. Elsevier Australia. ISBN:0729537528. Read it at Google Books - Find it at Amazon
2. Netter, F. H. (2019). Atlas of human anatomy. Philadelphia, PA: Elsevier.
3. Image: no reference available.

Ⓒ A. Manickam 2018

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