The psoas major is a long deep muscle that originates in the lumbar (lower-back) part of the body, passes anterior to (in front of) the ilium bone and is inserted into the top of the femur ('thigh bone').
When mentioned in older textbooks* the psoas major is sometimes called the 'psoas magnus'.
Origin, Insertion and Actions of the Psoas Major muscles:
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The psoas major muscle is labelled on the diagram of human anterior muscles.
The psoas major is sometimes described together with the psoas minor muscle, although the latter is not present in everyone and is omitted from some textbooks.
More about Muscles:
The following are some popular pages in the section about the human muscular system:
- The structure of muscle tissue
- The structure of muscle cells
- Labelled diagrams of the muscles in different parts of the body including anterior muscles, posterior muscles and facial muscles
- Types of muscle contractions
- Movements at joints
There are also more pages about the words used to describe muscles (terminology), the anatomy and physiology of muscles, muscular disorders and associated topics. See also books about sports medicine.
- Anterior Muscles
- Posterior Muscles
- Facial Muscles
- Muscle Terminology (Definitions)
- 1. Structure of Muscle
- 2. Structure of Muscle Cells
- 3. Muscle Filaments
- 4. Sliding Filament Theory
- 5. Neuromuscular Junction
- 6. Actions at Neuromuscular Junction
- Types of Muscle Contractions
- Muscular Disorders
- Effects of exercise on muscles