Quick Draw Anatomy for Anaesthetists by Joanna Oram Fox

Author:Joanna Oram Fox
Language: eng
Format: epub
Publisher: Scion Publishing

STEP 2

Draw the superior laryngeal nerve (SLN), a branch of the vagus nerve (CN X). The SLN branches from the vagus nerve at approximately C2. It then divides into the internal branch and external branch at the level of hyoid (C3).

The internal branch pierces the thyrohyoid membrane with the superior laryngeal artery. It supplies sensation above the cords.

The external branch supplies the cricothyroid muscle (see where it ends on the diagram).

STEP 3

Draw in the recurrent laryngeal nerve, a branch of the vagus nerve. It runs alongside the trachea and supplies sensation to the larynx below the vocal cords.

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