In assessing standing posture, which landmarks are used to evaluate pelvic alignment?

In assessing standing posture, which landmarks are used to evaluate pelvic alignment?

• A. ASIS and PSIS
• B. Iliac crest and greater trochanter
• C. Symphysis pubis and coccyx
• D. Sacral promontory and ASIS

Answer: (A)

In standing posture, pelvic alignment is best assessed by comparing two bony landmarks on each side of the pelvis that mark its front and back edges: the anterior superior iliac spine (ASIS) and the posterior superior iliac spine (PSIS). These points are easy to palpate and give a clear read on the pelvis’s orientation in the coronal plane. When the pelvis is level, the ASISs and PSISs on both sides sit at roughly the same vertical height. If one side shows a higher ASIS or PSIS than the other, that indicates pelvic obliquity or rotation, signaling how the pelvis tilts or twists in space. Other landmarks, like the iliac crest and greater trochanter, can help with general surface orientation but don’t provide the precise bilateral measure of tilt needed for evaluating pelvic alignment in standing posture. Midline landmarks such as the symphysis pubis and coccyx don’t offer the same quick bilateral comparison, and sacral promontory with ASIS isn’t used for this purpose because it doesn’t give a clear left-right assessment of levelness.

In standing posture, pelvic alignment is best assessed by comparing two bony landmarks on each side of the pelvis that mark its front and back edges: the anterior superior iliac spine (ASIS) and the posterior superior iliac spine (PSIS). These points are easy to palpate and give a clear read on the pelvis’s orientation in the coronal plane. When the pelvis is level, the ASISs and PSISs on both sides sit at roughly the same vertical height. If one side shows a higher ASIS or PSIS than the other, that indicates pelvic obliquity or rotation, signaling how the pelvis tilts or twists in space. Other landmarks, like the iliac crest and greater trochanter, can help with general surface orientation but don’t provide the precise bilateral measure of tilt needed for evaluating pelvic alignment in standing posture. Midline landmarks such as the symphysis pubis and coccyx don’t offer the same quick bilateral comparison, and sacral promontory with ASIS isn’t used for this purpose because it doesn’t give a clear left-right assessment of levelness.