What action does the supraspinatus do?
What action does the supraspinatus do?
Action. Contraction of the supraspinatus muscle leads to abduction of the arm at the shoulder joint. The supraspinatus also helps to stabilize the shoulder joint by keeping the head of the humerus firmly pressed medially against the glenoid fossa of the scapula.
What is the origin insertion and action of the supraspinatus?
The supraspinatus muscle originates from the supraspinous fossa, which is a concave surface at the top of the scapula. From the supraspinous fossa of the scapula, the supraspinatus muscle then extends laterally (outward) and inserts onto the humerus, which is the long bone that makes up the upper arm.
What is the action of the subscapularis muscle?
Arm position has a marked effect on the actions caused by this muscle: when the arm is raised, subscapularis pulls the humerus forward and downward; when the humerus is in a fixed position, subscapularis’ insertion can act as an origin and it producees abduction of the inferior border of the scapula.
What is the action of the supraspinatus quizlet?
Supraspinatus action. abduct the shoulder (glenohumeral joint), stabilize head of humerus in glenoid cavity. Supraspinatus origin. supraspinous fossa of the scapula.
What does subscapularis pain feel like?
The most common symptom of a subscapularis tear is shoulder pain, especially in the front of the shoulder. You might also hear or feel “clicking” in your shoulder when you rotate your arm. Some symptoms of a subscapularis tear are very similar to symptoms of other rotator cuff tears.
Why is the supraspinatus most commonly injured?
The supraspinatus tendon is the most commonly injured tendon of the four tendons because it lies predominantly in the space between the acromion and the humeral head.
What is the synergist of the supraspinatus?
Synergist: Deltoid, Infraspinatus, Teres major and minor, Subscapularis. Antagonist: Pectoralis major and minor, Subclavius, Serratus anterior, Trapezius, Latissimus dorsi, Rhomboid major and minor, and Levator scapulae.
What is the antagonist muscle of the supraspinatus?
The supraspinatus: agonistic: anterior deltoid, middle deltoid, lower trapezius, middle trapezius, teres minor, levator scapulae. antagonistic: latissimus dorsi, pectoralis major, pectoralis minor, serratus anterior, posterior deltoid, infraspinatus, rhomboid major, rhomboid minor.
How do you get rid of supraspinatus pain?
At first a conservative treatment is preferred. This treatment involves physical therapy, nonsteroidal anti-inflammatory drugs (NSAIDs), ice treatments and resting. Corticoid injections can also be used additional to physical therapy.