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Related Experiment Video

Updated: Jul 11, 2026

Minimally Invasive Murine Laryngoscopy for Close-Up Imaging of Laryngeal Motion During Breathing and Swallowing

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The supraglottic nerve supply: an anatomic study with clinical implications.

Arno Olthoff¹, Rolf Schiel, Eberhard Kruse

¹Department of Phoniatrics and Pedaudiology, University of Göttingen, Göttingen, Germany. olthoff@med.uni-goettingen.de

The Laryngoscope

|September 11, 2007

Summary

This study details the superior laryngeal nerve (SLN) and its branches, revealing crucial insights into supraglottic functions like swallowing and breathing. Understanding SLN anatomy aids in interpreting nerve disorders and minimizing surgical risks.

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Area of Science:

Anatomy
Neurology
Laryngology

Background:

The superior laryngeal nerve (SLN) plays a vital role in laryngeal function.
Detailed understanding of its branches and their relation to supraglottic structures is essential for clinical practice.

Purpose of the Study:

To meticulously describe the anatomical course of the superior laryngeal nerve (SLN) and its internal (intSLN) and external (extSLN) branches.
To clarify the innervation patterns related to supraglottic motor and sensory functions.

Main Methods:

Microsurgical dissection of the SLN and its branches in 30 human hemilarynges.
Detailed anatomical dissection of all laryngeal structures, including muscles, cartilages, and ligaments.

Main Results:

The intSLN branches to the epiglottis, aryepiglottic fold, ventricular fold, piriform sinus, and postcricoid region, with anastomoses to the recurrent laryngeal nerve (RLN).
The extSLN innervates the cricothyroid muscle (CT) and provides a potential innervation to the ventricular muscle (VM) via a branch extending into the larynx.

Conclusions:

The findings enhance understanding of supraglottic actions crucial for swallowing, coughing, and breathing.
Improved knowledge of SLN neuroanatomy aids in diagnosing nerve disorders and reducing risks associated with laryngeal and thyroid surgeries.