What are the retractors of the scapula?
The middle trapezius and rhomboid muscles are responsible for retraction of the scapula, but the middle fibres of the trapezius function as pure scapular retractors, whereas the rhomboids act both to retract the scapula and to rotate it to depress the glenoid fossa.
What are the scapular depressors?
Since scapular depressors (latissimus dorsi, lower trapezius) attach proximally to the trunk, the trunk serves as the proximal end of the chain. As we push downward, the scapulae, upper extremities and hands cannot move downward, so the depressors’ shortening contraction pulls the trunk upward instead.
What is scapular retraction and protraction?
During protraction, the scapulae move away from the spine as you round the upper back (thoracic spine). In retraction, the scapulae move towards the spine and towards each other. Retracting is done by squeezing the shoulder blades together.
What is the difference between scapular retraction and scapular protraction?
Protraction is accomplished by the actions of the serratus anterior, pectoralis major, and pectoralis minor muscles. Retraction is accomplished by the actions of the trapezius, rhomboids, and latissimus dorsi muscles. The elevation is accomplished by the trapezius, levator scapulae, and rhomboid muscles.
What muscles protract the scapula?
Muscles: rhomboideus major, minor, and trapezius are the prime movers. The muscles that protract and retract the scapula are antagonistic, that is, they have opposed actions. Used together, they fix the scapula in space to provide a fulcrum from which to move the (lever) arm.
What muscle upwardly rotates and protracts the scapula?
serratus anterior muscle
Conversely, orientation of the serratus anterior muscle allows it to upwardly rotate, externally rotate, and posteriorly tilt the scapula as it protracts the scapula.
What muscles upwardly rotate the scapula?
Results. The middle and lower serratus anterior muscles produce scapular upward rotation, posterior tilting, and external rotation. Upper trapezius produces clavicular elevation and retraction.
What is retraction and protraction?
Protraction and retraction are anterior-posterior movements of the scapula or mandible. For the mandible, protraction occurs when the lower jaw is pushed forward, to stick out the chin, while retraction pulls the lower jaw backward.
What is an example of protraction?
Examples of protraction include: With the shoulder in 90o of abduction, brings the arms forward as if to hug someone. The scapulae begin to slide laterally and then anteriorly along the thorax, this is protraction.
What muscle and or muscles elevate depress retract and protract the scapula 6 muscles?
The trapezius elevates, depresses, and retracts the scapula. The descending muscle fibers of the trapezius muscle internally rotate the arms. The transverse muscle fibers retract the scapulae, and the ascending muscle fibers medially rotate the scapulae.
What do you need to know about scapular retraction?
What Is Scapular Retraction. Scapular Retraction is when your scapula, most commonly known as the shoulder blade, moves closer to the spine. This movement should be done with your shoulders down and back to avoid any should shrugging or elevation.
Why are the rhomboid muscles called Scapular retractors?
In other words, the lower-trap and rhomboid muscles tug your scapula downward, as in the vertical pull exercises (pull-ups and lat pull-downs). The rhomboid muscles (together with the levator scapulae) anchor the scapula to the spine. That’s the main reason why we call them scapular retractor muscles.
Where is the protraction of the scapula located?
The Protraction of Scapula is also known as Scapular Abduction. Scapular Protraction Muscles are the Serratus Anterior, Pectoralis Major and Pectoralis Minor. These muscles are located in the chest and side of the torso. Often when we are performing an exercise where we are reaching away, we are exhibiting shoulder protraction.
How are scapular disorders related to shoulder injuries?
An alteration can also lead to injury if the normal ball-and-socket alignment of your shoulder joint is not maintained. Treatment for scapular disorders usually involves physical therapy designed to strengthen the muscles in the shoulder and restore the proper position and motion of the scapula.