Which two muscles together form the iliopsoas?

Which two muscles together form the iliopsoas?

• A. Iliacus and Psoas Major
• B. Rectus Femoris and Vastus Lateralis
• C. Gluteus Maximus and Gluteus Medius
• D. Adductor Longus and Adductor Brevis

Answer: (A)

The iliopsoas is formed by two muscles that come together to flex the hip: the iliacus and the psoas major. The iliacus originates in the iliac fossa of the pelvis, while the psoas major arises from the lumbar spine. They merge into a common tendon that inserts on the lesser trochanter of the femur, making this composite muscle the primary hip flexor, especially when lifting the thigh during walking or running. The two parts work together to pull the thigh upward, with the psoas major also connecting to the spine to help stabilize the lower back during movement. The other muscle pairs listed are different groups with their own distinct actions (knee extensors, hip abductors/extensors, or hip adductors) and do not form the iliopsoas.

The iliopsoas is formed by two muscles that come together to flex the hip: the iliacus and the psoas major. The iliacus originates in the iliac fossa of the pelvis, while the psoas major arises from the lumbar spine. They merge into a common tendon that inserts on the lesser trochanter of the femur, making this composite muscle the primary hip flexor, especially when lifting the thigh during walking or running. The two parts work together to pull the thigh upward, with the psoas major also connecting to the spine to help stabilize the lower back during movement. The other muscle pairs listed are different groups with their own distinct actions (knee extensors, hip abductors/extensors, or hip adductors) and do not form the iliopsoas.