What muscles are involved in scapular retraction?
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 muscle elevates and retracts scapula?
The trapezius is a large flat muscle that covers much of the upper back. Its fibers extend in several directions, and it elevates, retracts, and rotates the scapula freely. The rhomboideus and the levator scapulae muscles also retract and elevate the scapula.
What muscle retracts and depresses scapula?
Muscles
| Muscle | Origin | Action |
|---|---|---|
| Trapezius | Occipital Bone Ligamentum Nuchae & Spinous Process of Thoracic Vertebrae | Elevates, Retracts & Depresses, Rotates the Scapula Upward & Extends the Neck |
| Subclavius | 1st Rib | Depresses & Protracts the Shoulder |
| Subscapularis | Subscapular Fossa of the Scapula | Medial Rotation of the Shoulder |
What is retraction of scapula?
Scapular retraction describes the backward movement of the scapula about the thoracic wall (scapulothoracic joint). As the scapula moves towards the midline it can also be referred to as scapular adduction. The opposite motion is scapular protraction.
What causes scapular retraction?
Scapular retractions are those exercises that require you to pull the shoulder blades together toward the spine. However, the shoulders do not move upward toward the ears in these types of exercises. These movements focus specifically on improving the integrity and strength of the muscles around the shoulder blades.
Which muscle retracts rotates and fixes the scapula?
Rhomboid major muscle
| Rhomboid major | |
|---|---|
| Actions | Retracts the scapula and rotates it to depress the glenoid cavity. It also fixes the scapula to the thoracic wall. |
| Antagonist | Serratus anterior muscle |
| Identifiers | |
| Latin | musculus rhomboideus major |
What does levator scapulae muscle do?
The levator scapulae muscles are superficial extrinsic muscles of the back that primarily function to elevate the scapulae.
What is the action of subscapularis?
Action. Primary function is internal rotation of the humerus. It helps in shoulder adduction and extension in certain positions.
What muscles function in protraction and upward rotation of the scapula?
Image 4: The serratus anterior is also known as the “boxer’s muscle,” as it is largely responsible for the protraction of the scapula which occurs when throwing a punch.
When the shoulder blades are retracted which muscle is the antagonist?
Retraction of the scapula is sometimes called adduction of the scapula. The scapula is moved posteriorly and medially along the chest wall. 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.
What is the rhomboid muscle used for?
Functionally, the rhomboid muscles retract, elevate and rotate the scapula. They also protract the medial border of the scapula, keeping it in position at the posterior thoracic wall.
What does the serratus muscle do?
When the shoulder girdle is fixed, all three parts of the serratus anterior muscle work together to lift the ribs, assisting with respiration. The serratus anterior, also known as the “boxer’s muscle,” is largely responsible for the protraction of the scapula, a movement that occurs when throwing a punch.
What happens when levator scapulae is tight?
Commonly the definitive clinical feature associated with Lev Scap tightness is an inability or unwillingness to move the head/neck into rotation. Usually flexion and extension are pain-free. Only in chronic cases of Lev Scap tightness will full shoulder abduction be limited.
Does the latissimus dorsi depress the scapula?
Other minor depressors of the scapula include: latissimus dorsi. pectoralis major (secondarily through its action on the clavicle and humerus) trapezius.
What happens when the levator scapulae contracts?
If the scapula is fixed, a contraction of the levator scapulae leads to the lateral flexion of the cervical vertebral column to the side and stabilizes the vertebral column during rotation.
Are rhomboids under trapezius?
The rhomboid muscles, located on your upper back underneath the trapezius muscle, play a big part when it comes to posture. This is especially true if you have overdeveloped chest muscles or your shoulders pronate forward. The rhomboids are rhombus-shaped and are used to pull the shoulder blades together.