Trigger Point Therapy Versus Manipulation Correcting Thoracic Manipulable Lesion

Inclusion Criteria: * mechanical thoracic back pain * age 18-64 * presence of at least one spinal manipulable lesion * presence of a trigger point associated with the spinal manipulable lesion * able to lie prone on a treatment table for 15 minutes Exclusion Criteria: * absolute contraindications to spinal manipulation * specific thoracic back pain * bleeding diathesis, use of anticoagulants, long-term corticosteroid use * involved in litigation for thoracic back pain * inability to read or write English fluently * treatment with manipulation or myofascial therapy within past three days