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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.
Small breaks in the BBB allow inflammatory cells to enter the CNS, resulting in the inflammation that damages nerve cells in the brain or spinal cord. In MS, inflammatory cells attack myelin which is the fatty substance that surrounds and protects nerve fibers (or neurons). Myelin acts like a protective cover, similar to the plastic insulation that covers electrical wires. In neurons damaged by MS, parts of the myelin sheath (fatty covering) are missing.