{Reference Type}: Journal Article
{Title}: Anatomical localization of the motor entry point in the thyroarytenoid muscle.
{Author}: Kim SY;Song DH;Chung ME;
{Journal}: Muscle Nerve
{Volume}: 51
{Issue}: 1
{Year}: Jan 2015
{Factor}: 3.852
{DOI}: 10.1002/mus.24258
{Abstract}: <B>BACKGROUND: </B>The aim of this study was to localize the motor entry point (MEP) of the thyroarytenoid muscle.<BR><B>METHODS: </B>Eight cadaver larynges were dissected. A virtual plane was used to represent the MEP in a coordinate (X/Y/Z) system. The inferior border of the thyroid cartilage was linked to the center of the anterior arc of the cricoid cartilage (the Y-axis). The X-axis was set perpendicular to the Y-axis; the Z-axis passed through the posterior border of the thyroid lamina from the height of the insertion point.<BR><B>RESULTS: </B>The mean X, Y, and Z coordinates were 6.2 mm, 9.1 mm, and 11.0 mm, respectively. The calculated angles of the lateral and superior deflections were 29.4° and 35.8°, respectively. The calculated insertion depth, that is, the distance from the insertion point to the MEP, was 15.6 mm.<BR><B>CONCLUSIONS: </B>These results may help to improve the accuracy of needle insertion during diagnostic laryngeal electromyography or laryngeal electromyography-guided injections.