Final answer:
A posterior pelvic tilt is the rotation of the pelvis where the front rises and the back lowers, with a normal range being approximately between 30 to 40 degrees. It is related to the alignment of the lumbar vertebrae, psoas major, and iliacus muscles which are components of the core that aid in maintaining posture and stability.
Step-by-step explanation:
The question 'what degrees is a posterior pelvic tilt?' is associated with the field of health, particularly focusing on the musculoskeletal system and the biomechanics of the pelvis. A posterior pelvic tilt refers to the rotation of the pelvis that causes the front of the pelvis to rise and the back of the pelvis to lower. While there isn't a universally agreed upon degree for a posterior pelvic tilt as it varies among individuals, a normal pelvic tilt ranges approximately between 30 to 40 degrees.
Excessive posterior pelvic tilt can lead to lumbar spine issues, as the lumbar vertebrae are part of the posterior abdominal wall, which contributes significantly to core stability and posture. This wall consists of the lumbar vertebrae, parts of the ilia of the hip bones, the psoas major and iliacus muscles, and the quadratus lumborum muscle. These structures work together to support the body, and deviations in their alignment can affect overall posture and stability.