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Illustration showing the deep muscular layer of the larynx with a comparative view of both sides. On the left, the inferior pharyngeal constrictor muscle, cricothyroid muscle and thyrohyoid muscle are fully visible, with the thyrohyoid present bilaterally. On the right side, the pharyngeal constrictor has been removed to expose deeper structures of the larynx. The sternothyroid muscle has been mostly removed, leaving a remnant to indicate its position, while remnants of the sternohyoid and omohyoid muscles remain near the right hyoid