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This post discusses the 5 major hip flexor muscles and their anatomy - Psoas, Iliacus, Rectus Femoris, Tensor Fasciae Latae, and Sartorius. Psoas muscle is a powerful, deep hip flexor that connects from the lumbar vertebrae to the top of the femur.
A hip flexor muscle is a muscle that functions in flexing the hip, ie bringing the knee closer to the chest. Hip flexion is maximal with a high, forward kick that brings the leg above the level of the waist [1] .
The main flexors of the hip joint are the iliopsoas muscle (psoas major and iliacus) and the rectus femoris muscle. The pectineus , tensor fasciae latae and sartorius muscles assist as weak flexors.
2. Key Muscles Involved in Hip Flexion. The hip flexor muscle group is a complex network of muscles that work in concert to produce hip flexion. Among these muscles, four stand out as the primary contributors to this movement: the iliopsoas, rectus femoris, sartorius, and tensor fascia latae.
There are a lot of muscles of the hip and thigh. Learn their anatomy efficiently and easily using Kenhub's muscle anatomy and reference charts! Practically all muscles in this group have the same function: External rotation of the thigh at the hip joint; Abduction of the thigh from a flexed hip (excluding quadratus femoris)
Hip Flexor Anatomy and Function. Flexion refers to bending movements that decrease the angle between two body parts. When a flexor muscle contracts, it draws two bones together, bending at a joint. In the case of the hip flexor muscles, they draw together the upper leg and torso at the hip joint.
The iliopsoas muscle is the major flexor of your hip joint. It’s made up of three muscles: the iliacus, the psoas major, and the psoas minor. These muscles work together to flex your hip, as well as stabilize your hip and lower back during activities like walking, running, and rising from a chair.
The iliopsoas muscle is the strongest flexor of the hip joint. Simultaneous contraction of the psoas major and iliacus muscles produces a powerful flexion of the thigh at the hip joint. However, psoas major can independently act on its attachment on the lumbar spine when its distal end is fixed.
The hip flexor muscles are a group of muscles that help to flex the hip joint and bring the thigh closer to the chest. They consist of the iliacus, psoas, pectineus, rectus femoris, and sartorius muscles. The lymphatic drainage to the hip flexor muscles is described below:
Now let’s move on to look at the muscles which produce flexion at the hip joint. There are four, two that act only at the hip, and two that act at the hip and also at the knee. The first two are the most important hip flexors - they’re called iliacus, and psoas major.