During seating and mobility evaluations it is best practice to begin analyzing flexibility, movement, and posture of the pelvis when planning seating and positioning interventions. Therefore a thorough understanding of multi-joint muscles is essential, in relation to the pelvis as a foundation for seating. The lumbar spine and lower extremities are connected by multi-joint muscle groups with the pelvis caught in the middle, often resulting in a complex chain of movements. Understanding these multi-joint movement patterns of the pelvis is key to successful, functional seating and positioning outcomes. We will show how they work, and describe how seating accommodations and 24-hour posture care management can mitigate and improve problems caused by multi-joint muscle dysfunction around the pelvis. This article co-authored by Tamara Kittelson-Aldred, MS, OTR/L, ATP/SMS and T. Sammie Wakefield, OTR (ATP retired) focuses on
