The infraspinatus muscles are a pair of deep muscles, one on each side of the body, located below the spine of the scapula, which is a feature on the scapula (shoulder bone). These can be studied in relation to the supraspinatus muscles, which are located above the spine of the scapula, on the scapula bone.
The infraspinatus muscles are among the four rotator cuff muscles (on each side of the body) that help to support the head of the humerus in place in the glenoid cavity. The rotator cuff muscles are listed below.
Origin, Insertion and Actions of the Infraspinatus muscles:
|Point(s) of Origin:||
|Point(s) of Insertion:|
The infraspinatus muscles are labelled on the diagram of human posterior muscles.
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