Final answer:
The action of the psoas muscle includes hip flexion, which is true. It is part of the iliopsoas group which is essential for hip movement and stability.
Step-by-step explanation:
The action of the psoas muscle includes hip flexion, which is the motion of bringing the thigh closer to the abdomen. This is a true statement. The iliopsoas group, which consists of the psoas major and iliacus muscles performs this pivotal role in hip flexion. Strong and powerful, these muscles play a crucial role in stabilizing and moving the leg and the body.
Gluteal muscles such as the gluteus maximus, medius, and minimus, while important for moving the femur, are not primarily responsible for hip flexion. They extend and abduct the femur, contributing to the body's stabilization and movement. However, the iliopsoas muscle group is known for its pivotal action in hip flexion. Therefore, the statement regarding the psoas muscle's role in hip flexion is accurate.