Key facts about supraspinatus muscleTable quiz
| Origin | Supraspinous fossa of scapula |
| Insertion | Greater tubercle of humerus |
| Action | Shoulder joint: abduction of arm, stabil ... |
| Innervation | Suprascapular nerve (C5, C6) |
| Blood supply | Suprascapular artery |
| Origin | Supraspinous fossa of scapula |
|---|---|
| Insertion | Greater tubercle of humerus |
| Action | Shoulder joint: abduction of arm, stabilization of the humeral head in the glenoid cavity |
| Innervation | Suprascapular nerve (C5, C6) |
| Blood supply | Suprascapular artery |
What is the supraspinatus muscle?
The supraspinatus muscle is a rotator cuff muscle located in the shoulder, specifically in the supraspinatus fossa, a concave depression in the rear portion of the scapula, or shoulder blade.
Where is the supraspinatus tendon inserted?
The supraspinatus tendon is inserted into the superior facet of the greater tubercle of the humerus.
Where does the supraspinatus receive arterial supply?
Supraspinatus receives arterial supply from the suprascapular artery, a branch of the thyrocervical trunk of subclavian artery. The suprascapular artery passes through the suprascapular notch, along with the suprascapular nerve to supply supraspinatus.
How is the supraspinatus innervated and drained?
Innervation. Supraspinatus is innervated by the suprascapular nerve, ... Supraspinatus sometimes receives a collateral blood supply via the dorsal scapular artery. Venous drainage is conveyed by the same-named veins which accompany the arteries and drain into the subclavian vein.
What does the supraspinatus tendon attach to?
The supraspinatus tendon is inserted into the superior facet of the greater tubercle of the humerus.
What bones does the supraspinatus attach to?
361 The supraspinatus muscle arises from the fossa that lies superior to the scapular spine on the posterior portion of the scapula, passes beneath the acromion and the acromioclavicular joint, and attaches to the superior aspect of the greater tuberosity.
What does subscapularis attach to?
The subscapularis muscle originates at the subscapular fossa and inserts into the lesser tubercle of the humerus. The muscle internally rotates and adducts the humerus.
What is the proximal attachment for the supraspinatus?
Attachments of Supraspinatus :Origin & Insertion Origin: (proximal attachments) a. Supraspinous fossa of the scapula.
Where is supraspinatus pain felt?
Supraspinatus pain is felt at the side of the shoulder in the middle section of the deltoid. In some cases, it can be felt further round the front of the shoulder.
Where does infraspinatus attach?
Greater tubercle of humerusInfraspinatus muscleOriginInfraspinous fossa of scapulaInsertionGreater tubercle of humerusActionShoulder joint: Arm external rotation; Stabilizes humeral head in glenoid cavityInnervationSuprascapular nerve (C5, C6)Blood supplySuprascapular artery, circumflex scapular arteriesMay 11, 2020
Where does subscapularis tendon attach?
lesser tuberosity of the humerusThe fibres form a tendon which inserts into the lesser tuberosity of the humerus and the front of the shoulder joint capsule.
Does subscapularis attach to ribs?
The ventral surface of the scapula abuts the thoracic rib cage and has a large concavity called the subscapular fossa where the subscapularis attaches. Three ridges within this fossa allow for tendinous attachment.
What is the origin and insertion of the supraspinatus muscle?
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 does the supraspinatus muscle control?
The supraspinatus muscle originates from the supraspinous fossa of the scapula, passes under the acromion, and inserts on the superior facet of the greater tubercle of the humerus. It is responsible for the initiation of arm abduction and is in control of the motion up to the first 15 degrees of abduction.
Why is the supraspinatus most commonly injured rotator cuff muscle?
Trauma or other repetitive use injury can also lead to a rotator cuff tear. 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.
Is supraspinatus part of rotator cuff?
The supraspinatus muscle is the only muscle of the rotator cuff that is not a rotator of the humerus. The infraspinatus is a powerful lateral rotator of the humerus. The tendon of this muscle is sometimes separated from the capsule of the glenohumeral joint by a bursa.
Supraspinatus Muscle
Supraspinatus is a small muscle of the upper arm. It’s one of the four muscles that make up the rotator cuff.
Actions of Supraspinatus
a. Helps the deltoid muscle initiate the abduction of the arm at the shoulder (glenohumeral) joint.
Where does the supraspinatus muscle originate?
The supraspinatus muscle has its origin from the supraspinous fossa of the scapula and inserts into the upper facet of the greater tuberosity of the humerus (Fig. 42-1). The muscle passes across the superior aspect of the shoulder joint with the inferior portion of the tendon intimately involved with the joint capsule.
Which muscle is responsible for horizontal abduction of the shoulder?
Along with the deltoid and pectoralis major muscles, the supraspinatus muscle helps initiate horizontal abduction (raising the arms skyward) of the shoulder.
Which muscle pulls the head of the humerus medially towards the glenoid cavity?
Function. The supraspinatus muscle performs abduction of the arm, and pulls the head of the humerus medially towards the glenoid cavity. The supraspinatus works in cooperation with the deltoid muscle to perform abduction, including when the arm is in adducted position.
What tendon is most commonly torn in the shoulder?
The supraspinatus tendon is the most frequently torn tendon in the shoulder. Tears to the rotator cuff can be caused by an acute injury such as a fall, lifting or pulling, or lifting too much overhead. Chronic tears are more common and are caused by degenerative changes over the years.
Where is the supraspinatus located?
The supraspinatus muscle is a rotator cuff muscle located in the shoulder , specifically in the supraspinatus fossa, a concave depression in the rear portion of the scapula, or shoulder blade. It stretches horizontally to the scapula’s spine (elevated ridge), allowing it to pass under the acromial process, a bony structure at the top edge of the scapula. The muscle is attached to a flat, strong tendon that is connected to the shoulder joint capsule. Along with the deltoid and pectoralis major muscles, the supraspinatus muscle helps initiate horizontal abduction (raising the arms skyward) of the shoulder. In the case of a muscle retraction injury (when the muscle is drawn backwards, typically as the result of a muscle tear) to the supraspinatus muscle, a pull-forward surgery must be performed within three months before shortening or atrophy (muscle-wasting) occurs, rendering it irreparable.
Which muscle is responsible for horizontal abduction of the shoulder?
Along with the deltoid and pectoralis major muscles, the supraspinatus muscle helps initiate horizontal abduction (raising the arms skyward) of the shoulder.
Where is the supraspinatus located?
The supraspinatus (plural supraspinati) is a relatively small muscle of the upper back that runs from the supraspinous fossa superior portion of the scapula (shoulder blade) to the greater tubercle of the humerus. It is one of the four rotator cuff muscles and also abducts the arm at the shoulder. The spine of the scapula separates the supraspinatus muscle from the infraspinatus muscle, which originates below the spine.
Where does the supraspinatus muscle originate?
Structure. The supraspinatus muscle arises from the supraspinous fossa, a shallow depression in the body of the scapula above its spine. The supraspinatus muscle tendon passes laterally beneath the cover of the acromion. Research in 1996 showed that the postero-lateral origin was more lateral than classically described.
What is the red muscle on the left side of the spine?
Posterior view of muscles connecting the upper extremity to the vertebral column. Supraspinatus muscle is labeled in red at right, while it is covered by other muscles at left. The supraspinatus (plural supraspinati) is a relatively small muscle of the upper back that runs from the supraspinous fossa superior portion of the scapula (shoulder blade) ...
What muscle is shown in red?
Position of the supraspinatus muscle (shown in red). Animation.
What muscle is responsible for abduction of the head of the humerus?
It independently prevents the head of the humerus to slip inferiorly. The supraspinatus works in cooperation with the deltoid muscle to perform abduction, including when the arm is in adducted position.
Which muscle originates below the spine?
The spine of the scapula separates the supraspinatus muscle from the infraspinatus muscle, which originates below the spine.
Which muscle attaches to the lesser tubercle?
The distal attachments of the three rotator cuff muscles that insert into the greater tubercle of the humerus can be abbreviated as SIT when viewed from superior to inferior (for supraspinatus, infraspinatus, and teres minor), or SITS when the subscapularis muscle, which attaches to the lesser tubercle of the humerus, is included.
Where does the supraspinatus attach?
Where does the supraspinatus muscle attach? On the scapular end, the supraspinatus muscle attaches to a depression (fossa) on the top of the scapula that is technically called the supraspinous fossa. On the other end it attaches onto the very top of the head of the humerus.
How many degrees does supraspinatus move?
In terms of movement, supraspinatus does only one action, abduction of the humerus (first 10 degrees).
What does each letter in the rotator cuff stand for?
Below, you can see that each letter stands for one of the muscles in the group. They are: Supraspinatus. Infraspinatus. Teres Minor. Subscapularis. I often refer to the rotator cuff muscles as dynamic stabilizers since they both stabilize and control the movement of the head of the humerus in the shoulder.
What is the name of the muscle that attaches to the rotator cuff?
The rotator cuff muscles: supraspinatus. The “rotator cuff” gets its name as a result of the common tendinous attachment of the rotator cuff muscles and the way that that attachment sits over the head of the humerus.
Can adduction stretch supraspinatus?
It is hard to find examples of adduction that would stretch the supraspinatus, but vatayanasana with the elbows a little lower would start to get at it.
Where is the supraspinatus?
The supraspinatus (plural supraspinati) is a relatively small muscle of the upper back that runs from the supraspinous fossa superior portion of the scapula (shoulder blade) to the greater tubercle of the humerus. It is one of the four rotator cuff muscles and also abducts the arm at the shoulder.
Which muscle is responsible for horizontal abduction of the shoulder?
Along with the deltoid and pectoralis major muscles, the supraspinatus muscle helps initiate horizontal abduction (raising the arms skyward) of the shoulder.
What is the function of the subscapularis?
Function. The subscapularis rotates the head of the humerus medially (internal rotation) and adducts it ; when the arm is raised, it draws the humerus forward and downward. It is a powerful defense to the front of the shoulder-joint, preventing displacement of the head of the humerus.
What tendon is most commonly torn in the shoulder?
The supraspinatus tendon is the most frequently torn tendon in the shoulder. Tears to the rotator cuff can be caused by an acute injury such as a fall, lifting or pulling, or lifting too much overhead. Chronic tears are more common and are caused by degenerative changes over the years.
Where does the supraspinatus pain go?
If the supraspinatus contains active trigger points, you might experience local pain in the shoulder, right at these points. But you also might feel an ache in more distant, seemingly unrelated areas. The most classic pain pattern is pain at the side of the shoulder. Besides that, pain can radiate down the entire side of the arm – especially to ...
How to feel supraspinatus?
Locating and feeling the supraspinatus is easy. Just put your fingers slightly above the spine of scapula. Try not to go too high as you will then reach the middle part of your trapezius. You want to place your fingers between your trapezius and your spine of sca pula. Now slowly start to raise the arm to the side.
What muscle is used for shoulder pain?
Supraspinatus: Pain & Trigger Points. The supraspinatus muscle is one of the most common troublemakers when it comes to shoulder pain. It belongs to the rotator cuff group. People that often stress this muscle too much are painters, rock climbers, piano and violin players. In a nutshell, people that work with elevated arms for prolonged periods ...
What trigger points are activated in the supraspinatus?
Trigger Point Activation in the Supraspinatus. Trigger points in the supraspinatus usually develop due to active overload. Good examples might be carrying a heavy bag or executing dead lifts in the gym. In both scenarios the weight is pulling on the arms.
What is the function of the XS muscle?
3. Function. Its function is the abduction of the arm. Furthermore, it helps to keep the shoulder stabilized when moving it. I want to give you an example of how this muscle stabilizes the shoulder.
Where is the attachment point of the scapula?
Attachment Points. The muscle attaches planar on the shoulder blade just above the spine of scapula. From there it connects to the tuberculum majus at the humerus – the outer side of the upper arm –. The Xs in the picture below display common areas where tender and trigger points in this muscle commonly develop. 3.
Can supraspinatus pull out the humerus?
In both scenarios the weight is pulling on the arms. The supraspinatus needs to work hard to not let the humerus (upper arm bone) getting pulled out of the shoulder socket. But also, all activities where you work with the arms above the head are stressful, as they activate the muscle permanently.
Where does the supraspinatus muscle originate?
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.
Where is the supraspinatus tendon inserted?
The supraspinatus tendon is inserted into the superior facet of the greater tubercle of the humerus.
Where is the infraspinatus located?
Insertion of the Infraspinatus Specifically, the infraspinatus inserts onto a large, round prominence located at the top, outer portion of the humerus. This prominence is called the greater tubercle or greater tuberosity. The infraspinatus muscle inserts onto the greater tubercle of the humerus.
Overview
The supraspinatus (plural supraspinati) is a relatively small muscle of the upper back that runs from the supraspinous fossa superior portion of the scapula (shoulder blade) to the greater tubercle of the humerus. It is one of the four rotator cuff muscles and also abducts the arm at the shoulder. The spine of the scapula separates the supraspinatus muscle from the infraspinatus muscle, w…
Structure
The supraspinatus muscle arises from the supraspinous fossa, a shallow depression in the body of the scapula above its spine. The supraspinatus muscle tendon passes laterally beneath the cover of the acromion. Research in 1996 showed that the postero-lateral origin was more lateral than classically described.
The supraspinatus tendon is inserted into the superior facet of the greater tubercle of the humerus. …
Function
The supraspinatus muscle performs abduction of the arm, and pulls the head of the humerus medially towards the glenoid cavity. It independently prevents the head of the humerus from slipping inferiorly. The supraspinatus works in cooperation with the deltoid muscle to perform abduction, including when the arm is in an adducted position. Beyond 15 degrees the deltoid muscle becomes increasingly more effective at abducting the arm and becomes the main propa…
Clinical significance
Diagnosis
Antero-posterior projectional radiography of the shoulder may demonstrate a high-riding humeral head, with an acromiohumeral distance of less than 7 mm.
Repair
One study has indicated that arthroscopic surgery for full-thickness supraspinatus tears is effecti…
Additional images
• Position of the supraspinatus muscle (shown in red). Animation.
• Muscles around the left shoulder, seen from behind. 3. Latissimus dorsi muscle 5. Teres major muscle 6. Teres minor muscle 7. Supraspinatus muscle 8. Infraspinatus muscle 13. long head of Triceps brachii muscle.
• Action of right supraspinatus muscle, anterior view. Three bones shown are acromion (top) and coracoid process (center) of scapula, and humerus
• Position of the supraspinatus muscle (shown in red). Animation.
• Muscles around the left shoulder, seen from behind. 3. Latissimus dorsi muscle 5. Teres major muscle 6. Teres minor muscle 7. Supraspinatus muscle 8. Infraspinatus muscle 13. long head of Triceps brachii muscle.
• Action of right supraspinatus muscle, anterior view. Three bones shown are acromion (top) and coracoid process (center) of scapula, and humerus (left).
External links
• GoogleBody - Supraspinatus muscle