Scapular Adduction – Also called scapular extension or retraction. It is
a movement the opposite of abduction
. Throwing the shoulder back and pinching the shoulder blades together illsutrates adduction of the shoulder girdles.
What causes adduction of the scapula?
Adduction is accomplished primarily by
the pectoralis major, latissimus dorsi, teres major, triceps, and coracobrachialis
. The deltoid and the supraspinatus, a muscle that runs along the scapula in the back, are the two main abductors of the shoulder.
What muscles do scapular adduction?
The rhomboids
(major and minor) function to stabilize the medial border of the scapula. The rhomboids are very active in scapular adduction or retraction, which can be defined as backward rotation of the scapula toward the vertebral column.
What is adduction and abduction of the shoulder?
Abduction:
upward lateral movement of humerus out to
the side, away from the body, in the plane of the scapula. Adduction: downward movement of humerus medially toward the body from abduction, in the plane of the scapula.
What is abduction in shoulder?
Abduction occurs when you have arm movement away from the middle of your body.
When you raise your arm out from the sides of your body
, it’s an abduction of your shoulder. … This places your hands above your head with your arms straight.
What is the main function 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.
How does the scapula attach to the body?
The scapula is a flat, triangular-shaped bone (colloquially as the “shoulder blade”). It is located in the upper thoracic region on the dorsal surface of the rib cage. It connects
with the humerus at the glenohumeral joint as well as the clavicle at the acromioclavicular joint to form the shoulder joint
.
What happens when scapular adductors are weak?
If the scapular adductors are weak, fatigued, or injured,
the muscular tension created by the pectoralis minor will tilt the scapulae forward and down, resulting in kyphosis
. … Scapular protraction is also known as abduction. Concentric activity of the pectoralis minor results in abduction of the scapula.
What are the 3 shoulder muscles?
The deltoid muscle is the main muscle of the shoulder. It consists of three muscle heads:
the anterior deltoid, lateral deltoid, and posterior deltoid
.
Which muscle supports the arm in a position of 90 degrees of abduction?
The trapezius and serratus anterior
muscles work in tandem to coordinate rotation and movement of the scapula to accommodate the full range of motion of the arm. Specifically, they facilitate abduction of the arm from 90 degrees and further upwards.
What muscle allows you to lift your arm?
What Is It?
Your rotator cuff
is made up of muscles and tendons that keep the ball (head) of your upper-arm bone (humerus) in your shoulder socket. It also helps you raise and rotate your arm.
What is an example of shoulder abduction?
Shoulder abduction: Stand and hold a weight in your hand with your palm facing your body.
Slowly raise your arm to the side with your thumb pointing up
. Then raise your arm over your head as far as you can without pain.
What is a 90 degree shoulder?
What are 90 Degree Shoulders? Basically, you
want a nice straight line from your shoulder down your arm
, forming 90 degrees! Additionally, for this look people prefer a super pronounced collar bone as well as a long swan-like neck.
What is normal external rotation of the shoulder?
Normal range of active movement of the shoulder has been specified by the American Academy of Orthopedic Surgeons (AAOS) to be 180° for flexion and abduction and
90°
for external rotation [6].
