Dose Response Effects of Cervical Spinal Manipulative Therapy (SMT) on Pressure Sensitivity of Myofascial Trigger Points

A real cervical spine manipulation will be used for the intervention vs a sham cervical spine manipulation. For the rcSMT the subject's head will be supported by the clinician's forearm. The contact hand of the clinician will contact the C5-C6 spinal segment. A thrust maneuver will be given by the contact hand of the clinician with the supportive hand resting on the subject's zygoma. A rotational inferior drop thrust maneuver will be completed. For the scSMT the subject's head will be rotated to 45 degrees and will be supported by the clinician's forearm, which will lie on top if the headpiece. A thrust maneuver will then be given by the contact hand of the treating clinician to the drop piece with the hand beside the paraspinal musculature simulating a real thrust, the supportive hand will be resting on the subject's zygoma. A inferior drop thrust will be applied to the drop piece (no thrust is made by the contact hand on the cervical spine).