What forms the floor of the femoral triangle?

• A. Rectus Femoris
• B. Iliopsoas
• C. Quadratus Femoris
• D. Pectineus

Answer: (B)

The floor of the femoral triangle is formed by the iliopsoas muscle. This muscle, which comprises the iliacus and psoas major, plays a crucial role in hip flexion and is situated deep within the pelvis, making it a critical anatomical structure for functions related to movement in the lower limb. The relationship of the iliopsoas to the femoral triangle emphasizes its importance in this region, as it supports not just movement but also stabilizes the hip and assists in maintaining posture.

The rectus femoris, while a significant muscle in the anterior compartment of the thigh, primarily contributes to knee extension and hip flexion and does not form the floor of the femoral triangle. Similarly, the quadratus femoris functions primarily as an external rotator of the hip and is located in a different region, contributing to external rotation rather than forming any part of the femoral triangle's floor. The pectineus, although it is situated within the borders of the femoral triangle and participates in hip adduction and flexion, is not the muscle responsible for forming the floor; instead, it lies above the iliopsoas. Thus, the iliopsoas is rightly identified as the structure that composes the floor of