What is the infraspinatus responsible for?
Infraspinatus is the main external rotator of the shoulder joint. It assists in producing shoulder extension. With the arm fixed, it abducts the inferior angle of the scapula.
What exercise uses the infraspinatus?
Among the infraspinatus muscle exercises are prone horizontal abduction with external rotation (PER),6,10,11 shoulder external rotation in the scapular plane,18 side-lying external rotation (SER),4,6,10 and standing external rotation (STER).
Does infraspinatus laterally rotate the arm?
Actions of Infraspinatus: Laterally rotates the arm at the shoulder (glenohumeral) joint.Dec 4, 2017
Does the infraspinatus adduct the arm?
Infraspinatus is a thick triangular muscle that occupies the majority of the dorsal surface of the scapula. It arises mostly from the infraspinous fossa of scapula, and connects it to the proximal humerus....Infraspinatus muscle.OriginInfraspinous fossa of scapulaBlood supplySuprascapular artery, circumflex scapular arteries3 more rows•May 11, 2020
How long does supraspinatus tendonitis take to heal?
The poor blood supply and vascularity of tendons mean that is can take a long time for them to heal on there own. Without treatment, supraspinatus tendonitis can take up to 6 months to heal. Treatments such as Prolozone Therapy can significantly speed up the healing process.Jan 22, 2021
How do you loosen a tight rotator cuff?
Stand in a doorway, holding both sides of the frame at or just below shoulder height. Lean forward gently, keeping the back straight until there is a light stretch in the front of the shoulders. Lean further forward to intensify the stretch if necessary. It should not feel at all painful.Feb 13, 2019
How do you tear your infraspinatus?
Infraspinatus tear It's usually caused by repetitive stress or normal aging. A complete, or full-thickness, tear severs the infraspinatus from the bone. It's usually caused by an acute injury, such as falling.Jan 15, 2020
What is the antagonist to infraspinatus?
The infraspinatus: agonistic: anterior deltoid, latissimus dorsi, lower trapezius, pectoralis major, pectoralis minor, serratus anterior, teres minor. antagonistic: middle deltoid, middle trapezius, posterior deltoid.Aug 2, 2019
What is the blood supply for the infraspinatus?
The infraspinatus is supplied arterially by the suprascapular and circumflex scapular arteries. The suprascapular artery either originates from the thyrocervical trunk or the subclavian artery.Aug 13, 2021
Why is infraspinatus tight?
It's usually caused by repetitive stress or normal aging. A complete, or full-thickness, tear severs the infraspinatus from the bone. It's usually caused by an acute injury, such as falling.Jan 15, 2020
What is distal infraspinatus?
Your infraspinatus muscle is a thick triangular muscle located at the back of your shoulder. It's attached to the top of your upper arm bone (humerus) and your shoulder blade (scapula).May 3, 2021
What is the infraspinous fossa of the scapula?
Infraspinous Fossa - large scooped out hollow beneath the spine of the scapula where the infraspinatus originates. Subscapular Fossa - this is on the anterior (front) surface of the shoulder blade. The subscapularis originates here.Aug 22, 2018
What is the function of the infraspinatus?
The main functions of the infraspinatus are assisting in external rotation of the shoulder joint, scaption, and lateral rotation of the humerus.
What is the purpose of the Infraspinatus muscle stretches?
Infraspinatus Muscle Stretch. Try these Infraspinatus Muscle stretches to keep your movement and muscles healthy and supple. “I start with the cross body stretch and then demo 2 variations of the chicken wing stretch. After that, I walk you through 3 variations of the towel stretch.
What muscles help with shoulder motion?
These muscles contribute to help form the glenohumeral joint which aids in shoulder joint motion and stability. These muscles allow the shoulder joint to have stability while being one of the most mobile joints in the body. The main functions of the infraspinatus are assisting in external rotation of the shoulder joint, scaption, ...
What muscle is the scapula?
The Infraspinatus Muscle is a thick triangular muscle that occupies much of the infraspinous fossa of the scapula. It is a member of the rotator cuff, commonly remembered by the mnemonic “SITS” (supraspinatus, infraspinatus, teres minor, subscapularis). These muscles contribute to help form the glenohumeral joint which aids in shoulder joint motion ...
What is the difference between infraspinatus and tendinopathy?
Infraspinatus tendinopathy. Infraspinatus tendinopathy is a less severe injury to the infraspinatus. There are two types: Tendonitis is an inflammation of the tendon. Tendinosis is small tears in the tendon that don’t cause much inflammation. Causes of tendinopathy include:
What are the transition points of a tendon to bone?
The transition point of a tendon to bone insertion can be broken down into the following four zones: tendon midsubstance, fibrocartilage, calcified fibrocartilage, and bone. In addition to the rotator cuff muscles, the glenohumeral joint is further stabilized by ligaments and connective tissues.
How to release infraspinatus?
“Take a lacrosse ball or tennis ball, whichever level of firmness you can tolerate, and press the ball between your Infraspinatus muscles and a wall, or other solid structure.
What is the function of the infraspinatus?
The main functions of the infraspinatus are assisting in external rotation of the shoulder joint, scaption, and lateral rotation of the humerus .[1][2][3][4] The infraspinatus is a thick triangular muscle that occupies much of the infraspinous fossa of the scapula. It is a member of the rotator cuff, commonly remembered by the mnemonic “SITS” ...
What is the infraspinatus?
The infraspinatus is composed of cross-striated muscles of mesodermal origin. The muscles of the shoulder arise from a common early-muscle mass that is continuous with the pectoral mass and the common arm sheath known as the upper limb bud.
What muscle is responsible for glenohumeral stability?
The infraspinatus muscle's action on the shoulder is primarily through its function as a rotator cuff muscle providing glenohumeral stability. The rotator cuff applies compression upon the head of the humerus that allows for the stabilization of the humeral head during shoulder abduction.
What muscle is in the rotator cuff?
Anatomy, Shoulder and Upper Limb, Infraspinatus Muscle - StatPearls - NCBI Bookshelf. The infraspinatus is a thick triangular muscle that occupies much of the infraspinous fossa of the scapula. It is a member of the rotator cuff, commonly remembered by the mnemonic “SITS” (supraspinatus, infraspinatus, teres minor, subscapularis).
What are the transition points of a tendon to bone?
The transition point of a tendon to bone insertion can be broken down into the following four zones: tendon midsubstance, fibrocartilage, calcified fibrocartilage, and bone. [5] In addition to the rotator cuff muscles, the glenohumeral joint is further stabilized by ligaments and connective tissues.
What muscles are used to stabilize the shoulder joint?
These muscles allow the shoulder joint to have stability while being one of the most mobile joints in the body. The main functions of the infraspinatus are assisting in external rotation of the shoulder joint, scaption, and lateral rotation of the humerus. [1][2][3][4] Structure and Function.
Which muscle has the second largest anatomic footprint on the humerus?
Compared to the other rotator cuff muscles, the infraspinatus has the second-largest anatomic footprint on the humerus. The subscapularis has the largest. The infraspinatus also acts on the scapula.
What is the infraspinatus?
The infraspinatous muscle is one of the four muscles that comprise the rotator cuff. The other muscles are the supraspinatus, teres minor, and subscapularis. It is a triangular shoulder muscle ...
Which muscle is attached to the infraspinatous fossa?
The other muscles are the supraspinatus, teres minor, and subscapularis. It is a triangular shoulder muscle that rises above and is attached to the infraspinatous fossa, which is more commonly known as the shoulder blade. This muscle aids in the lateral motion and horizontal extension of the arm as well as overall joint stability.
What is the muscle that attaches to the suprascapular nerve?
This thin shoulder muscle is attached to the suprascapular nerve and is therefore associated with the fifth and sixth cervical vertebrae. Two thirds of this muscle is composed of fleshy fibers, while the other third is devoted to tendinous fibers that become the infraspinatous tendon.
What is the infraspinatus tendons?
Infraspinatus Tendon Tear. The infraspinatus muscle is one of the four rotator cuff muscles. The 4 Rotator Cuff muscles include: The Rotator Cuff Muscles work to stabilize the shoulder joint throughout movements. The infraspinatus rotates the shoulder outward or externally. It is located along the back of the shoulder blade, or scapula.
Where is the infraspinatus located?
The infraspinatus rotates the shoulder outward or externally. It is located along the back of the shoulder blade, or scapula. External rotation of the shoulder is an essential part of activities of daily living.
What muscles are involved in shoulder joint complex?
washing your hair in the shower. scratching your upper back. Dr. Carlos Tandron states, "The rotator cuff muscles play such an important role in the function of the shoulder joint complex. It is so important to be properly evaluated when you have shoulder pain or the inability to lift your arm over your head.".
How to treat infraspinatus tendon tear?
In order to treat an infraspinatus tendon tear, one must be evaluated in order to know the severity of the injury and be guided in the best course of treatment. If the tear is not significant or the patient does not require maximum stability within the shoulder for daily activities, work requirements, or recreation the best treatment option may be conservative care.
What causes infraspinatus tear?
Injury to the infraspinatus muscle commonly occurs due to overuse of the shoulder in recreational activities, work-related activities, or history of shoulder instability.
Can an infraspinatus tendon tear cause pain?
Patients with an infraspinatus tendon tear will also have pain while sleeping, reaching overhead, working on the computer, and reaching behind. They may also experience weakness in the affected arm causing them to predominately utilize their other arm as compensation.
