Type of Article:  Original Research

Volume 5; Issue 4.3 (December 2017)

Page No.: 4751-4755

DOI: https://dx.doi.org/10.16965/ijar.2017.463


Veena Vidya Shankar 1, Komala N *2, Shailaja Shetty 3.

1,*2 MBBS, MD, Associate Professor, Department of Anatomy, Ramaiah Medical College, Bangalore, Karnataka, India.

3 MBBS, MD, Professor & Head, Department of Anatomy,  Ramaiah Medical College, Bangalore, Karnataka, India.

Address for Correspondence: Dr. Komala N,  Associate Professor, Department of Anatomy, Ramaiah Medical College, Bangalore – 560054, Karnataka, India. Contact No.: Mobile: 9480259177, E-Mail: komas2001@yahoo.com


Introduction: The superior thyroid artery is one of the ventral branches arising from external carotid artery in the neck region but it may also arise from common carotid artery or at bifurcation of common carotid artery. It forms a major source of vascular supply to the thyroid gland along with inferior thyroid artery. The relation of the nerve to the artery and apex of lateral lobe of thyroid gland is extremely variable. Inadvertent ligation of external laryngeal nerve along with superior thyroid artery during thyroidectomy results in paralysis of cricothyroid muscle and produces dysphonia.

Aims: To identify the variations in the site of origin, the level of origin, number and the length of the superior thyroid artery

Materials and Methods: The present study is a cross-sectional study and was carried out in  80 embalmed specimens in Department of Anatomy at Ramaiah Medical College. The superior thyroid artery supplying the thyroid gland was meticulously dissected and digitally photographed. The parameters studied were site of origin, level of origin, number and the length of the artery from the origin to the entry of gland. The measurements were taken three times to avoid intraobserver variation and their mean value has been considered. Data so collected has been entered in a master chart in Microsoft® Excel and has been analyzed using the SPSS version 17.0.

Results: In the present study, superior thyroid artery was single, arising predominantly from external carotid artery at the level of upper border of thyroid cartilage and main trunk measured 4.38±1.42 cm.

Conclusion: Knowledge of the anatomical variations of superior thyroid artery with respect to its origin, level of origin and its relation to external laryngeal is important before attempting any interventional or surgical procedure in the neck region.

Key words: Thyroid Gland, External Carotid Artery, Common Carotid Artery, Superior Thyroid Artery, Carotid Bifurcation.


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Cite this article: Veena Vidya Shankar, Komala N, Shailaja Shetty. A CROSS-SECTIONAL STUDY OF SUPERIOR THYROID ARTERY IN HUMAN CADAVERS. Int J Anat Res 2017;5(4.3):4751-4755. DOI: 10.16965/ijar.2017.463