Fig. 3.

A shows the cricoarytenoid joint facet on the rim of the cricoid cartilage on the left (CA) and the arytenoid cartilage on the joint facet on the right (AC) with the muscular process (MP) in the back, the point of attachment of the posterior cricoarytenoid and lateral cricoarytenoid muscles and the vocal process (VP) in the front with the motion of the vocal process for abduction moving up and outward. [Borrowed with permission from (132).] B shows how the superior view of the larynx reduces the two-dimensional motion of the vocal process to a lateral medial motion (132). Ci is reconstructed from MRI scans of a human larynx with the vectors of the posterior cricoarytenoid (PCA) and lateral cricoarytenoid (LCA) muscles attached from the muscular process of the arytenoid to different points on the cricoid cartilage. [Borrowed with permission from (131).] Cii shows the vectors of the thyroarytenoid (TA) muscle and the vocalis (VF) attaching the front aspect of the arytenoid cartilage to the thyroid cartilage (131).