Complaints of back pain are usually rare as the upper back/the thoracic region is strong and stable to
support the weight of the upper body. Upper back pain, is pain that is felt between the bottom of the neck
and top of the lumbar spine. The most common cause of upper back pain is believed to originate from
muscular irritation or other soft tissue (e.g. ligament) problems. These can arise from lack of strength, poor
posture, overuse injuries (such as repetitive motion), or a trauma (such as a car accident or sports injury).
Another cause of upper back pain is problems with the joints that connect the vertebrae and the ribs.
(Wikipedia, http://en.wikipedia.org/wiki/Upper_back_pain). Although upper back pain is not a very common
spinal disorder, it can cause significant discomfort and pain when it does occur. The most common causes of
upper back pain are muscular irritation (myofascial pain) and joint dysfunction (Talbot, J.S. DO
http://www.spine-health.com/conditions/upper-back-pain/all-about-upper-back-pain). Also, the prolonged
malposture of the head on the neck may cause muscle fatigue, pain, and stiffness because of steady
contraction of the muscle-tendon unit and deviation from normal body posture.