
Tina V. answered 08/28/20
Exercise science and human performance tutor specializing in anatomy
Kyphosis refers to 1 of 3 disorders that affect the natural spinal curvature. The condition is characterized by excessive/exaggerated rounding of the upper back and thoracic spine--within the sagittal plane--and therefore slouched/hunchback appearance.
This exaggerated curvature is more of a static/chronic posturing of the spinal column rather than a voluntary/acute action or change in joint position such as flexion/extension. Spinal curvature disorders or conditions can be congenital, and/or develop over time.