What is the function of the posterior belly of the digastric muscle?

The function of the posterior belly of the digastric muscle is to pull the hyoid up and posteriorly. This muscle is one of the suprahyoid muscles, which primarily play a role in the movement of the hyoid bone and assist in the actions of swallowing and phonation. When the posterior belly contracts, it elevates the hyoid bone, which is important for maintaining the position of the larynx during these functions. This upward and backward movement helps in stabilizing the hyoid and supporting the movement of the tongue during speech and swallowing.

Understanding the role of the digastric muscle in the context of the entire suprahyoid muscle group can clarify its importance in the overall mechanics of the throat and neck areas, especially when coordinating movements during speaking and eating.