Final answer:
Degenerative spondylolisthesis most commonly affects the lumbar spine, specifically the fifth lumbar vertebra (L5) slipping forward on the sacrum (S1). Treatment options include physical therapy, medication, bracing, and surgery.
Step-by-step explanation:
Degenerative spondylolisthesis most commonly affects the lumbar spine, specifically the fifth lumbar vertebra (L5) slipping forward on the sacrum (S1). This condition occurs due to the wear and tear of the intervertebral discs and facet joints in the spine, which can lead to instability and vertebral slippage.
As the discs and joints degenerate, the stability of the spine diminishes, and the vertebra can shift forward. The degeneration is often caused by factors such as aging, genetics, and repetitive stress on the spine. Symptoms may include back pain, sciatica, and muscle weakness.
Treatment options for degenerative spondylolisthesis include physical therapy, pain medication, bracing, and in severe cases, surgery. The specific level affected may vary depending on the individual, but the most common level is L4-L5 or L5-S1.