The periscapular muscles are a group of muscles that play a crucial role in shoulder function. These muscles are located on the sides of the neck and back and help to control the movement and stability of the shoulder joint. The following article provides an overview of the periscapular muscles including their function, origin, insertion, and muscle action.
Function and Origin
The periscapular muscles are divided into two main groups: the infra-scapular group and the supra-scapular group. The infra-scapular group includes the rhomboids and the subclavius muscles, while the supra-scapular group includes thelevator scapulae and the rhomboid minor.
| Muscle Group | Function | Origin | Insertion |
|---|---|---|---|
| infra-scapular | Control shoulder posture and movement | Nuchal ligament | scapula |
| Stabilize the Glenoid | Scapula | Glenoid fossa | |
| Help in arm elevation | Scapular | Humerus | |
| Internal/external rotation | Scapular | Glenoid | |
| Adduction and abduction | Scapular | Clavicle | |
| Extension | Scapular | Humerus | |
| Support of scapula | Scapular | Clavicle |
Insertion
The periscapular muscles insert on the scapula, which is the bony structure that connects the arm to the torso. The specificInsertion sites vary depending on the muscle group.
Action
The periscapular muscles contract to produce movements of the shoulder joint. They help to control the positioning and movement of the shoulder, including adduction, abduction, internalrotation, and externalrotation. These muscles work in coordination with other muscles of the shoulder girdle to provide stability and movement of the shoulder.
Clinical Considerations
Injuries to the periscapular muscles can lead to a variety of shoulder problems, including shoulder impingement, shoulder tendinitis, and shoulder arthritis. Treatment for these conditions may include physical therapy, medication, and surgery. It is important for athletes and active individuals to incorporate exercises that target these muscles into their training regimen to prevent injury and improve performance.
Resources and Further Reading
These resources provide more detailed information on the anatomy and function of the periscapular muscles, as well as information on clinical considerations and treatment options.
