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The mylohyoid elevates the hyoid and the tongue. This is particularly important during swallowing and speaking. Alternatively, if other muscles are used to keep the position of the hyoid fixed, then the mylohoid depresses the mandible. It also functions as reinforcing the floor of mouth. This muscle is supplied by inferior alveolar nerve (branch of mandibular nerve). See more about this muscle here Mylohyoid muscle - Wikipedia. You can find the function of any other muscle in the same way, more easily than asking on Quora and awaiting answers that may or may not be right.
These muscles are mesodermal in embryologic origin. The mylohyoid muscle is derived from the first pharyngeal arch . Structure The mylohyoid muscle is flat and triangular, and is situated immediately superior to the anterior belly of the digastric muscle . It is a pharyngeal muscle (derived from the first pharyngeal arch ) and classified as one of the suprahyoid muscles .