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THYROID GLAND-ARTERIAL BLOOD SUPPLY

Anatomy-Neck

THYROID GLAND-ARTERIAL BLOOD SUPPLY

SUPERIOR THYROID ARTERY
1. The superior thyroid artery (first branch of the ECA), after giving off its SCM and superior laryngeal branches pierces the pretracheal fascia to reach the upper pole.
2. The artery divides into a anterior branch (runs down to the isthmus) + posterior branch (runs to the back of the lobe and anastamoses with the inferior thyroid artery).
3. The left artery lies in front of the external laryngeal n. & may supply the pyramidal lobe.

INFERIOR THYROID ARTERY
4. Branch of the thyrocervical trunk.
5. Arches upwards and medially, behind the lower pole and divides outside the pretracheal fascia.
6. The right recurrent laryngeal nerve has a variable relationship to the artery but always lies behind the pretracheal fascia.

THYROIDEA IMA ARTERY
7. Enters the lower part of the isthmus in 3% of individuals.


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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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