Overview
The anatomy of the iliacus is the simplest of the hip flexors.
Origin
- Iliac fossa of the ilium
Insertion
- lesser trochanter of the femur
Function
- flexion of the hip
Innervation
- femoral nerve. The nerve root varies, depending on study from L1-L4 but always seems to involve L2-L3.
Iliacus is the most direct and straightforward hip flexor connecting the coxal bone to the femur as it passes over the hip joint. It is part of the iliopsoas complex or deep abdominals.
It is a flat triangular muscle that blends with the fibers of psoas major as it passes over the pubic bone and extends toward the lesser trochanter.
There are infrequent anomalies. They involve a portion that may stay separated as it travels to the insertion on the lesser trochanter. Also, there is an infrequent split belly. Here is one of the studies on its variations.
Here’s a picture of iliacus as it fits into the iliopsoas complex and blends with psoas major.
Related Posts
Iliacus – Functional Anatomy
Iliopsoas Complex – Functional Anatomy
Iliopsoas Complex – Massage Therapy Notes
Self Care – Kneeling Stretch for Hip Flexors
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