Validation of a Pressure Pain Threshold Scale in Patients Diagnosed With Myofascial Pain Syndrome and Fibromyalgia

Inclusion Criteria: * Control group: Individuals with no current or prior diagnosis consistent with Myofascial Pain Syndrome (MPS) or Fibromyalgia (FM). * MPS group: Individuals with a diagnosis of MPS that does not meet the American College of Rheumatology (ACR) diagnostic criteria for FM. * FM group: Individuals who met the criteria for a diagnosis of FM based upon the ACR diagnostic criteria. Exclusion Criteria: * Current neurologic conditions (e.g. Multiple Sclerosis) * Current metabolic conditions (e.g. Diabetic Neuropathy) * Current systemic conditions (e.g. Rheumatoid Arthritis) * Any skin or connective tissue problems (e.g. Marfan Syndrome) * Current symptoms of numbness, tingling, burning, coldness, or pain in your back, hands, or feet. * Any prior surgeries that may affect their ability to participate in this study. * A pacemaker or electrical implant that may be affected by electronic equipment. * Currently taking medications that may alter a subject's sensation or affect their ability to participate in this study. * Current shingles or post-herpetic neuralgia. * Current open skin wounds on your neck, arms, back, or legs * Current injuries at the designated palpation sites. * Currently having other medical conditions or limited function that might affect participation. * The ability to tolerate testing duration and procedures. * The ability to understand and complete all consent forms and questionnaires.