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ARTERY-EXTERNAL CAROTID

Anatomy-Neck

ARTERY-EXTERNAL CAROTID

ORIGIN & COURSE
1. Commences at the bifurcation of the CCA at the greater horn of the hyoid.
2. The ECA enters the parotid gland where it is separated from the ICA by the deep part of the gland + pharyngeal structures (STYLOPHARYNGEUS, glossopharyngeal nerve, pharyngeal branch of the vagus).

RELATIONS
3. At its commencement the ECA lies against the wall of the pharynx; its place soon taken by the ICA which then lies against the pharynx all the way up to the BOS.
4. At its commencement the IJV lies lateral, but higher up it lies posterior + deep.
5. Except at its commencement, the artery lies in front of the anterior border of the SCM.
6. The facial vein crosses the artery with CN XII lying in between.

SURFACE MARKING
7. Surface marking of the ECA is along a line from its bifurcation at the greater horn of the hyoid, passing behind the angle of the mandible, to in front of the tragus of the ear.


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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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