Myofascial Pain Syndrome.- Myofascial Pain Syndrome.- Morphology of Myofascial Trigger Points: What Does a Trigger Point Look Like?.- Fibromyalgia Syndrome.- Fibromyalgia Syndrome: Clinical Aspects and Management.- Gender, Genetics, and Other Risk Factors Increasing Vulnerability to Fibromyalgia.- Other Muscle Pain Syndromes.- Low Back Pain of Muscular Origin.- Masticatory Muscle Pain.- Inflammatory Myopathies.- Whiplash Injury, Muscle Pain and Motor Dysfunction.- Brain Imaging of Muscle Pain.