How does the scapula move during shoulder extension?
And the acromion process Walla scapula laterally rotate 30 to 40 degrees and begins to elevate. The clavicle rotates 30 to 50 degrees posteriorly. And elevates another 15 degrees in reality.
What are the 6 movements of the scapula?
The scapula is an important bone in the function of the shoulder joint. It engages in 6 types of motion, which allow for full-functional upper extremity movement including protraction, retraction, elevation, depression, upward rotation, and downward rotation.
What is happening during shoulder flexion?
A shoulder flexion is when you move your arms anywhere from a resting position by your sides to straight above your head. An extension is when you move your arms and stick them out behind you. The muscles involved in the flexion movement include the anterior deltoid, pectoralis major and coracobrachialis.
What are the 4 movements of the shoulder?
Adduction: downward movement of humerus medially toward the body from abduction, in the plane of the scapula. Flexion: the movement of humerus straight anteriorly. Extension: the movement of humerus straight posteriorly. External rotation: the movement of humerus laterally around its long axis away from the midline.
Does the scapula elevate during shoulder flexion?
When we perform flexion, the glenohumeral (GH) joint contributes 100°-120°. 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 downward rotation of the scapula?
Downward rotation of the scapula occurs as the arm is returned to the side from a raised position. The motion is described similar to upward rotation, except that the clavicle depresses at the SC joint and the scapula downwardly rotates at the AC joint.
What are the 7 movements of the shoulder?
The human shoulder is the most mobile joint in the body. This mobility provides the upper extremity with tremendous range of motion such as adduction, abduction, flexion, extension, internal rotation, external rotation, and 360° circumduction in the sagittal plane.
How does the position of the scapula affect shoulder joint flexion?
What muscle initiates shoulder flexion?
Posterior rotator cuff muscles appear to be counterbalancing anterior translational forces produced during flexion and it would appear that supraspinatus is one of the muscles that consistently “initiates” flexion.
What causes downward rotation of the scapula?
It creates the shoulder joint where it meets with the head of the humerus—the bone of the upper arm.
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Categories.
| Action of the Scapula | What the Action Looks Like (Try It Yourself) | Primary Muscles |
|---|---|---|
| Downward rotation | Return the arms downward from the overhead | Rhomboids |
What motion is expected of the scapula during arm elevation?
Upward rotation
Scapular position on the thorax and control during motion is a critical component of normal shoulder function. During elevation of the arm overhead, the scapula should upwardly rotate and posteriorly tilt on the thorax (FIGURE). Upward rotation is the predominant scapulothoracic motion.
What muscles do upward rotation of scapula?
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.
What are the 10 shoulder joint movements?
This mobility provides the upper extremity with tremendous range of motion such as adduction, abduction, flexion, extension, internal rotation, external rotation, and 360° circumduction in the sagittal plane. Furthermore, the shoulder allows for scapular protraction, retraction, elevation, and depression.
What muscle moves the scapula?
The scapula is moved posteriorly and medially along the chest wall. Muscles: rhomboideus major, minor, and trapezius are the prime movers.
What is the agonist muscle in shoulder flexion?
Agonist is deltoid, antagonist is the latissimus dorsi. As the muscles contract across the shoulder joint it brings your shoulder upward into flexion as you push the ball the opposite happens and the antagonist becomes your deltoid and the latissimus dorsi becomes your agonist.
What movements does the scapula perform?
Scapula Movement | Functional Anatomy – YouTube
Does the scapula elevate in shoulder flexion?
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 muscle moves the scapula forward and downward?
Pectoralis minor draws the scapula forward and downward, and raises the ribs in forced inspiration. The subclavius muscle is a small muscle that lies deep to pectoralis major muscle.
What are the agonist and antagonist muscles in shoulder flexion?
What plane of movement is scapular protraction?
horizontal plane rotations
Protraction is a summation of horizontal plane rotations at both the SC and AC joints. These are translatory motions of the scapula away from or toward the vertebral column, respectively.
What muscles do downward rotation of scapula?
When the arm is fully abducted, downward rotation of the scapula (or glenoid fossa) occurs first in adduction of the arm. Muscles: pectoralis minor and major (through humerus), subclavius, and latissimus dorsi (through the humerus).
What is downward rotation of scapula?
What muscles rotate the scapula downward?
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 |
Which muscle pulls the scapula down?
The rhomboids are rhombus-shaped and are used to pull the shoulder blades together. They also rotate the scapula in a downward direction and provide stability for your shoulders.
What is the antagonist for shoulder flexion?