1) Laryngeal electromyography must show increased muscle discharge of the thyroarytenoid or posterior cricoarytenoid
muscles at the affected pitch(es).
There even exists a "NG tube syndrome" (5), the pathophysiological mechanism of which is thought to be paresis of the posterior cricoarytenoid
muscles secondary to ulceration and infection over the posterior lamina of the cricoid.
Additionally, the epiglottis-posterior hypopharyngeal wall distance was narrowed, and the inferior constructor muscle and posterior cricoarytenoid
muscle were compressed due to osteophytes on the left side.
Endoscopic arytenoid reduction was performed along with chemical tenotomy of the posterior cricoarytenoid
using 10 units of botulinum toxin.
The cricoarytenoid joint is a synovial joint enclosed by a capsule that receives posterior support from the posterior cricoarytenoid
pressed" is maintained through the adductors, that is, the lateral cricoarytenoid (LCA) and interarytenoid (IA) muscles, and their antagonist, the posterior cricoarytenoid
(PCA) muscle, which is an abductor (see Figure 1c).
Thus, the adductory and abductory muscles, namely the lateral cricoarytenoid, the interarytenoid, the posterior cricoarytenoid
(and to some degree the thyroarytenoid muscles) get plenty of short burst activity.