The suprascapular artery supplies the supra- and infraspinatus muscles and travels with the suprascapular nerve. It is a direct branch from the subclavian artery (12%), the thyrocervical trunk (27%) or the internal thoracic artery (11%).
What nerve supplies the subscapularis?
The subscapularis is innervated by both the upper subscapular nerve (USN) and lower subscapular nerve (LSN). Both the USN and LSN arise from the posterior cord of the brachial plexus.
What arteries supply the rotator cuff muscles?
The major arterial supply to the rotator cuff is derived from the ascending branch of the anterior humeral circumflex artery, the acromial branch of the thoracoacromial artery, as well as the suprascapular and posterior humeral circumflex arteries.
What are the branches of the Subscapular artery?
About 4 cm from its origin it gives off two branches, first the scapular circumflex artery and then the thoracodorsal artery. From the thoracodorsal artery it supplies latissimus dorsi, while the scapular circumflex artery participates in the scapular anastamosis.What artery is above collar bone?
The suprascapular artery is a branch of the thyrocervical trunk, which emerges from the first part of the subclavian artery. It runs across the front of your neck and behind the clavicle (collarbone) to supply blood to the muscles, skin, and bones in your chest and shoulder.
What are the skeletal attachments of the subscapularis?
The subscapularis is a large triangular muscle which fills the subscapular fossa and inserts into the lesser tubercle of the humerus and the front of the capsule of the shoulder-joint.
What does the subscapular artery do?
The main function of the subscapular artery is to provide blood supply for the muscles and skin of the shoulder, upper extremity and thoracic wall. The supplied muscles include the deltoid, latissimus dorsi, long head of triceps brachii, subscapularis, supraspinatus, infraspinatus and serratus anterior muscles.
What artery supplies the teres minor?
The teres minor is supplied by the subscapular artery and one of its branches, the circumflex scapular artery, as well as the posterior circumflex humeral artery. The subscapular artery and the posterior circumflex humeral artery arise from the third, most distal portion of the axillary artery.What are the attachments of the subscapularis?
OriginSubscapular fossa of scapulaInsertionLesser tubercle of humerusActionShoulder joint: Arm internal rotation Stabilizes humeral head in glenoid cavityInnervationUpper and lower subscapular nerves (C5 – C6)Blood supplySuprascapular artery, axillary artery, subscapular artery
What does the thoracodorsal artery supply?The thoracodorsal artery supplies predominantly the latissimus dorsi muscle but also gives branches to the serratus anterior muscle, the axillary skin, the subscapular and teres major muscles.
Article first time published onDoes subscapular artery supply to breast?
The lateral thoracic, acromiothoracic, and subscapular arteries are all branches or sub-branches of the axillary artery and may all contribute to the arterial supply of the breast.
Where is common interosseous artery?
The common interosseous artery is a branch of the proximal part of the ulnar artery at the level of the pronator teres in the distal part of the cubital fossa. It is a short vessel that dives laterally and deeply before bifurcating into anterior and posterior interosseous arteries.
What artery supplies the supraspinatus muscle?
The supraspinatus receives its blood supply from the suprascapular and the dorsal scapular arteries. [7] The suprascapular artery is typically a branch of the thyrocervical trunk, a branch of the subclavian artery, though it may arise directly from the third part of the subclavian artery.
What arteries supply 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.
What is the action of the subscapularis muscle?
Action. Primary function is internal rotation of the humerus. It helps in shoulder adduction and extension in certain positions.
What is the space between your collarbones called?
The suprasternal notch, also known as the fossa jugularis sternalis, or jugular notch, or Plender gap is a large, visible dip in between the neck in humans, between the clavicles, and above the manubrium of the sternum.
Is the clavicle a rib?
The collarbone is a thin doubly curved long bone that connects the arm to the trunk of the body. Located directly above the first rib, it acts as a strut to keep the scapula in place so that the arm can hang freely.
What is a shoulder blade called?
The scapula, or shoulder blade, is a large triangular-shaped bone that lies in the upper back.
What artery supplies serratus anterior?
Serratus anteriorArterylateral thoracic artery, superior thoracic artery (upper part), thoracodorsal artery (lower part)Nervelong thoracic nerve (from roots of brachial plexus C5, 6, 7)Actionsprotracts and stabilizes scapula, assists in upward rotation.
What does superior thoracic artery supply?
The main function of this artery is to provide blood supply for the pectoralis major, pectoralis minor, subclavius and serratus anterior muscles. … Additionally, it supplies the muscles and adjacent skin of the first two intercostal spaces.
What does lateral thoracic artery supply?
The lateral thoracic artery supplies the axillary lymph nodes, serratus anterior, pectoralis major, pectoralis minor and subscapularis muscles. … Additionally, it can provide blood supply to the breast in females.
What artery supplies the teres major?
OriginDorsal surface of inferior angle of scapulaInsertionMedial lip of intertubercular groove of humerusActionAdducts and medially rotates armInnervationLower subscapular nerve (C6 and C7) (C6, C7)Arterial SupplySubscapular and circumflex scapular arteries
Where does the supraspinatus attach?
Insertion. The supraspinatus tendon is inserted into the superior facet of the greater tubercle of the humerus.
What is the distal attachment of the subscapularis muscle?
Attachments of Subscapularis Muscle: Origin & Insertion Subscapular fossa of the scapula. Insertion: (distal attachments) Lesser tubercle of humerus.
Where is subscapularis attached?
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 of the Coracobrachialis?
Origin and insertion The coracobrachialis is a slender muscle that originates from the deep surface of the coracoid process of scapula. The muscle fibers run inferolaterally towards the humerus. They insert onto the anteromedial surface of the humeral shaft, between the brachialis muscle and the medial head of triceps.
Where does Brachioradialis attach?
OriginLateral supracondylar ridge of humerus, lateral intermuscular septum of armInsertion(Proximal to) styloid process of radiusActionElbow joint: Forearm flexion (when semi pronated)InnervationRadial nerve (C5-C6)Blood supplyRadial artery, radial recurrent arteries, radial collateral artery
Does infraspinatus abduct?
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.
Is subscapularis part of rotator cuff?
The subscapularis muscle is one of the four muscles and tendons that surround the shoulder called the rotator cuff. Rotator cuff tears (RCTs) usually involve the infraspinatus or supraspinatus tendons.
What artery supplies the triceps Brachii?
The arterial supply to the triceps is provided by the deep brachial artery, which is a branch of the brachial artery and is supplied by ulnar collateral arteries. The venous drainage is the brachial vein that runs with the deep brachial artery.
What artery travels with thoracodorsal nerve?
The thoracodorsal artery is a branch of the subscapular artery. It travels inferiorly with the thoracodorsal nerve and supplies the latissimus dorsi.
