Shoulder blade protraction during rotator cuff internal/external rotations?
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Asked by: Thomas Spencer
How does the scapula move during shoulder internal rotation?
The scapula upwardly rotates when you reach your arm up overhead. During this motion, the inferior angle of the scapula (see photo above) rotates up (superiorly) and to the side (laterally). At the top of your overhead motion, your scapula should be upwardly rotated about 55 degrees. Downward Rotation.
What does the scapula do during external rotation?
Upward & Downward Rotation
Upward rotation of the scapula on the thorax is the primary motion of the scapula observed during active elevation of the arm and plays a significant role in increasing the range of elevation of the arm overhead.
Does the rotator cuff allow for internal and external rotation?
The rotator cuff contains four muscles: Supraspinatus controls internal rotation and lifting of the arm. Infraspinatus allows you to externally rotate your arm in the shoulder socket. Teres minor is a small muscle that helps rotate your arm.
What causes shoulder 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 is protraction of the scapula?
What Is Scapular Protraction? Also called abduction of the scapula, this is when the scapulae move laterally away from the spine. It is essentially the opposite of scapular retraction. The muscles involved in shoulder abduction are the serratus anterior, pectoralis major, and pectoralis minor.
What muscle causes scapular protraction?
Scapular Protraction Muscles are the Serratus Anterior, Pectoralis Major and Pectoralis Minor. These muscles are located in the chest and side of the torso.
What plane does protraction and retraction occur in?
Protraction and retraction (and protrusion and retrusion)
Protraction and retraction occur in two major regions of the body – the scapula and the mandible.
What muscles do internal rotation of scapula?
And also the horizontal. And inferior fibers of the trapezius. Now when it comes to a lateral rotation medial rotation lateral rotation what's going to play a role here is the upper fibers of the
What motion occurs at the scapula during shoulder elevation?
flexion and abduction
The scapula on the thorax contributes to elevation (flexion and abduction) of the humerus by upwardly rotating the glenoid fossa 50° to 60° from its resting position.
Why is scapular retraction important?
Why is it so important? It’s a movement that focuses on improving the integrity and strength of your shoulder blades. Apart from everything else, it helps improve your posture, making it a crucial movement for everyone to get right.
Why does shoulder blade stick out?
Scapular dyskinesis is easily identified because it causes your shoulder blades to stick out abnormally either during rest or activity. Scapular dyskinesis is also called winging because your shoulder blades stick out like wings on your back.
What does scapular winging indicate?
Scapular winging is almost always caused by damage to one of three nerves that control muscles in your arms, back, and neck: the long thoracic nerve, which controls the serratus anterior muscle. the dorsal scapular nerve, which controls the rhomboid muscles. the spinal accessory nerve, which controls the trapezius …
What causes internal rotation of the shoulder?
The rotator cuff is composed of four muscles: the supraspinatus, infraspinatus, teres minor and subscapularis (Figure 1b). The subscapularis facilitates internal rotation, and the infraspinatus and teres minor muscles assist in external rotation. The rotator cuff muscles depress the humeral head against the glenoid.
What muscles perform internal rotation of the shoulder?
Internal Rotators
The primary muscles that internally rotate the GH joint are the teres major, pectoralis major, subscapularis, latissimus dorsi, and anterior deltoid. Many of these muscles are also powerful shoulder extensors and adductors. Often, lifting activities incorporate all of these actions.
How does the scapula glide?
Scapula gliding across the thorax
Normally the scapula moves across the thorax gliding on a scapulothoracic motion interface. The deep surface of this interface consists of the ribs and their covering musculature. The superficial surface of the interface consists of the scapular border along with the serratus muscles.
What does the scapula do during a low row?
Scapular position and movement to the thorax are critical for normal glenohumeral function and facilitates optimal shoulder movements [9] [10][11]. The scapula provides a base for glenohumeral mobility and surrounding muscles play a role in scapula stabilization. …
When should you retract your scapula?
“As the arms pull the weight back in line with the shoulders [i.e., the weight is lifted], the scapulae should retract.” Price notes that scapular movement will change slightly if the position of the arm or grip position is altered.
Why is scapular retraction important?
Why is it so important? It’s a movement that focuses on improving the integrity and strength of your shoulder blades. Apart from everything else, it helps improve your posture, making it a crucial movement for everyone to get right.
What muscles do downward rotation of the scapula?
Categories
| Action of the Scapula | What the Action Looks Like (Try It Yourself) | Primary Muscles |
|---|---|---|
| Upward rotation | Lift the arms overhead; scapulae will follow and rotate upward | Upper and middle trapezius |
| Downward rotation | Return the arms downward from the overhead | Rhomboids |
What plane does protraction and retraction occur in?
Protraction and retraction (and protrusion and retrusion)
Protraction and retraction occur in two major regions of the body – the scapula and the mandible.
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 muscles rotate the scapula upward?
The middle and lower serratus anterior muscles produce scapular upward rotation, posterior tilting, and external rotation. Upper trapezius produces clavicular elevation and retraction. The middle trapezius is primarily a medial stabilizer of the scapula.
Which muscle retracts rotates and fixes the scapula?
Rhomboid major indicated in red. Retracts the scapula and rotates it to depress the glenoid cavity. It also fixes the scapula to the thoracic wall.
What motion occurs at the scapula during shoulder elevation?
flexion and abduction
The scapula on the thorax contributes to elevation (flexion and abduction) of the humerus by upwardly rotating the glenoid fossa 50° to 60° from its resting position.
What is a positive Hawkins Kennedy test?
A positive Hawkins-Kennedy test is indicative of an impingement of all structures that are located between the greater tubercle of the humerus and the coracohumeral ligament. The impinged structures include the supraspinatus muscle, teres minor muscle, and the infraspinatus muscle.
What does scapular winging indicate?
Scapular winging is almost always caused by damage to one of three nerves that control muscles in your arms, back, and neck: the long thoracic nerve, which controls the serratus anterior muscle. the dorsal scapular nerve, which controls the rhomboid muscles. the spinal accessory nerve, which controls the trapezius …
What happens during shoulder elevation?
AS SCAPULAR UPWARD ROTATION CONTINUES, Tension in the coracoclavicular ligament produces a passive force that rotates the clavicle backward. Because the clavicle is shaped like a crank, backward clavicular rotation elevates the distal end of the clavicle and, with it, the acromion and the AC joint.
Why is shoulder external rotation important?
Sufficient external rotation in shoulders helps keeping your shoulders healthy and improve your posture as well as the ability to reach and lift objects overhead.
