Topographic anatomy of the internal laryngeal nerve: Surgical considerations
Article first published online: 26 APR 2011
Copyright © 2011 Wiley Periodicals, Inc.
Head & Neck
Volume 34, Issue 4, pages 534–540, April 2012
How to Cite
Paraskevas, G. K., Raikos, A., Ioannidis, O. and Brand-Saberi, B. (2012), Topographic anatomy of the internal laryngeal nerve: Surgical considerations. Head Neck, 34: 534–540. doi: 10.1002/hed.21769
- Issue published online: 3 MAR 2012
- Article first published online: 26 APR 2011
- Manuscript Accepted: 25 JAN 2011
- iatrogenic injury;
- internal laryngeal nerve;
- superior laryngeal artery;
- surgical applications;
- surgical identification;
- thyrohyoid membrane
This study is focused on the topographic features of the internal branch of the superior laryngeal nerve (ibSLN) at the thyrohyoid membrane area using as anatomic landmarks the posterior border of the thyrohyoid muscle and the superior border of the thyroid cartilage.
Thirty-six fresh adult cadavers were dissected to determine the topography and branching pattern of the ibSLN and the superior laryngeal artery.
The ibSLN prior to thyrohyoid membrane's penetration was divided into 3 or 2 branches, in 72.22% and 27.78% of cases. The trifurcated ibSLN was more common than the bifurcated in both sexes and in both sides of the neck. In over 80% of cases the ibSLN penetrated the thyrohyoid membrane 0.1 to 0.9 cm far from the posterior border of the thyrohyoid muscle and 0.1 to 1.2 cm far from the superior border of the thyroid cartilage.
We provide a schematic overview of the ibSLN penetration zone at the thyrohyoid membrane, the so-called danger zone, to avoid ibSLN damage. © 2011 Wiley Periodicals, Inc. Head Neck, 2012