Final answer:
Kyphosis is the correct answer as it refers to the excessive posterior curvature of the thoracic region, also known as hunchback posture.
Step-by-step explanation:
The rounding of the spine into an excessive posterior curvature in the thoracic region is known as kyphosis, which is also commonly referred to as hunchback posture. This condition can be caused by weakening and erosion of the vertebrae due to osteoporosis, leading to their collapse. It's important to distinguish kyphosis from other spinal disorders such as lordosis, characterized by an excessive anterior curvature of the lumbar region, and scoliosis, which is an abnormal lateral curvature of the spine.
Kyphosis is the rounding of the spine into a hunchback posture. It is characterized by an excessive posterior curvature of the thoracic region. This condition can develop due to osteoporosis, causing weakening and erosion of the upper thoracic vertebrae. Lordosis, on the other hand, is an excessive anterior curvature of the lumbar region and is commonly associated with obesity or late pregnancy. The accumulation of body weight in the abdominal region results in an anterior tilt of the pelvis and a pronounced enhancement of the lumbar curve.