This advanced lecture and lab course is structured so that clinicians will gain an appreciation for the postural influences of: rib torsion, asymmetrical oblique strength, inconsistent breathing patterns, habitual use of accessory respiratory musculature, and a positionally restricted diaphragm. The focus of this course will be to assess and restore polyarticular muscular chain function of the thorax. Treatment interventions including manual and non-manual techniques to restore reciprocal and alternating respiratory and rotational function of the thorax will be covered. Participants will be able to immediately apply PRI clinical assessment and intervention strategies when treating diagnoses such as shortness of breath, thoracic outlet syndrome, and shoulder dysfunction.