Which muscle acts synergistically with the iliacus?

The iliacus muscle works closely with the psoas major to form the iliopsoas group, which is a major flexor of the hip joint. Both muscles originate from different locations but share a common insertion point on the femur, specifically at the lesser trochanter. This anatomical relationship allows them to function synergistically to flex the thigh at the hip, and they are essential for movements such as marching, running, and climbing stairs.

The psoas major provides stability to the hip joint and the lumbar spine while also assisting in maintaining posture. As they work together, the strength and flexibility of the combined iliopsoas can significantly influence athletic performance and functional movement patterns. Understanding the synergy between these two muscles is crucial for massage therapists as they seek to address issues related to hip mobility and lower back pain.