muscular process of arytenoid cartilage muscular process of arytenoid cartilage the muscular process of arytenoid cartilage is the posterolateral projection of the (short, rounded, and prominent) lateral angle of the base of the arytenoid cartilage. the muscular process gives insertion to the posterior cricoarytenoid muscles behind, and to the lateral cricoarytenoid muscles in front. muscular process of arytenoid cartilagethe cartilages of the larynx. posterior view.detailsidentifierslatinprocessus muscularis cartilaginis arytenoideaeta98a06.2.04.013ta2987fma55351anatomical terminology