The mylohyoid muscle is a thin, flat muscle located in the floor of the mouth. It stretches from the mandible (lower jaw) to the hyoid bone, forming a supportive base for the tongue and aiding in swallowing and speaking. This muscle is innervated by the mylohyoid nerve, a branch of the trigeminal nerve. Its contraction helps elevate the hyoid bone and the floor of the mouth, playing a crucial role in the movement of food during chewing and the process of swallowing.