Lateral view from a videofluoroscopic swallowing study with marked points and lines for laryngeal position at rest. The straight line joining the anteroinferior corner of the second cervical vertebra (C2) and the anteroinferior corner of the fourth cervical vertebrae (C4) is taken as the y‐axis. The line perpendicular to the y‐axis passing through C2 is set as the x‐axis. Laryngeal position at rest (LPR) is measured by drawing a line perpendicular to the y‐axis from the anterosuperior margin of the thyroid cartilage, and measuring the distance from the point of intersection to the anteroinferior corner of C2