EBSLN
Also written as: EBSLN — external branch of the superior laryngeal nerve
External branch of the superior laryngeal nerve, responsible for cricothyroid muscle innervation.
Full Definition
The external branch of the superior laryngeal nerve (EBSLN) is a motor nerve that innervates the cricothyroid muscle, which is responsible for vocal cord tension and pitch control. During thyroid surgery, particularly when dissecting the superior pole, the EBSLN is at risk of injury. Damage to this nerve results in loss of vocal pitch control and voice fatigue, particularly affecting professional voice users such as singers. The nerve's anatomical course is variable, making identification challenging during surgery.
Usage
Usage note: Use all capitals without periods. Spell out on first use in patient documents.
In Context
- "The EBSLN was identified and preserved during superior pole dissection." — operative report
- "Postoperative voice assessment revealed intact EBSLN function with normal pitch control." — postoperative note