Final answer:
Lordosis, known as swayback, is an abnormal increase in the anterior curvature of the lumbar spine that can result in shearing stress on vertebrae and the lumbosacral disc, particularly due to shifts in the body's gravity line caused by factors like obesity or developmental issues.
Step-by-step explanation:
Understanding Dorsolumbar Lordosis
Lordosis, often referred to as swayback, represents an excessive anterior curvature of the lumbar region of the vertebral column. This condition can lead to increased shearing forces along the lower vertebrae, which are less capable of handling shear stress compared to compressional forces.
Developmental anomalies, pathological changes, and obesity are factors that can enhance the spine's natural curves and result in abnormal lordosis.
The resulting anterior shift in the line of gravity causes an anterior tilt of the pelvis and a pronounced lumbar curve, which can place additional strain on the vertebral column and intervertebral discs, especially the lumbosacral disc.
Orthopedists commonly treat conditions like lordosis, which can arise from various causes including poor posture, abnormal growth, or obesity.
In certain cases, disorders such as osteoporosis can weaken vertebrae, contributing to excessive curvature and related symptoms. Lordosis can have significant effects on the body, impacting mobility and potentially leading to back pain or injury.