The thoracic part of the spine is located in the 'middle' part of your back (in between the shoulder blades) and is formed of 12 vertebrae with a disc that resides in-between each one.
The design of the thoracic vertebrae differ to that of the cervical and lumbar region to provide muscular attachments for the numerous muscle groups that run past and through this area plus provide attachments for the 12 ribs. As a result, this part of our backs is stiff and rigid, with little movement provided except for the upper thoracic which do participate in rotation of the neck.
The most common problems are those associated with the intervertebral joins (facet joints) and the costovertebral or costotransverse articulations of the ribs. These joints are continuously creating movement, with the stabilising ligamentous structures, during respiration to allow the chest wall to expand.
While rare, a prolapsed disc may created altered sensation along the chest wall and due to it's close proximity to the vital organs, such as the lungs and the heart, it is important to exclude any pain that may be coming from these structures.