Iliopsoas (Iliacus) origin?

Iliopsoas (Iliacus) origin?

• A. Iliac fossa of ilium
• B. Ischial tuberosity
• C. Pubic symphysis
• D. Greater trochanter

Answer: (A)

The main region being tested is where the iliacus part of the iliopsoas begins. The iliacus muscle originates from the iliac fossa of the ilium (the broad, hollow inner surface of the ilium, near the iliac crest). This origin location lets the iliopsoas act effectively as a hip flexor when its tendon joins with the psoas major and inserts on the lesser trochanter of the femur. The other options don’t fit because the ischial tuberosity is where some hamstrings originate, the pubic symphysis is not a primary starting point for this muscle group, and the greater trochanter is a common insertion site for several gluteal muscles, not the origin of the iliacus.

The main region being tested is where the iliacus part of the iliopsoas begins. The iliacus muscle originates from the iliac fossa of the ilium (the broad, hollow inner surface of the ilium, near the iliac crest). This origin location lets the iliopsoas act effectively as a hip flexor when its tendon joins with the psoas major and inserts on the lesser trochanter of the femur. The other options don’t fit because the ischial tuberosity is where some hamstrings originate, the pubic symphysis is not a primary starting point for this muscle group, and the greater trochanter is a common insertion site for several gluteal muscles, not the origin of the iliacus.