The pectoralis major muscle therefore derives its blood supply from the pectoral branch of the thoraco-acromial artery, the lateral thoraci: artery and to a lesser extent the superior thoracic artery(ies) (Fig. 2).
Beside above, what is the origin and insertion of the pectoralis major? Both the clavicular and sternal heads of the pectoralis major muscle have the same two points of insertion. These two points of insertion are both located on the humerus, which is the long bone of the upper arm. The pectoralis major muscle inserts on the bicipital groove and deltoid tuberosity of the humerus.
Simply so, what Innervates the pectoralis major?
The pectoralis major receives dual motor innervation by the medial pectoral nerve and the lateral pectoral nerve, also known as the lateral anterior thoracic nerve. The sternal head receives innervation from the C7, C8 and T1 nerve roots, via the lower trunk of the brachial plexus and the medial pectoral nerve.
What artery supplies the Subclavius?
What is pectoralis minor syndrome?
Pectoralis minor syndrome (PMS) is a condition causing pain, numbness and tingling in the hand and arm. It often coexists with thoracic outlet syndrome (TOS) but can also occur alone. Like TOS, there may be pain above the shoulder blade in back as well as in the neck.
How do I strengthen my serratus anterior?
First, you can do a few simple exercises at home that can get your serratus anterior into gear. Do shoulder blade protractions. Lean against a wall and press the backs of your palms and your elbows against it. Scapular pushups. Do scapular pushups. Wall exercises for the serratus anterior.
What is the role of the pectoralis major?
The pectoralis major muscle is a large muscle in the upper chest, fanning across the chest from the shoulder to the breastbone. The pectorals are predominantly used to control the movement of the arm, with the contractions of the pectoralis major pulling on the humerus to create lateral, vertical, or rotational motion.
What movement does the pectoralis minor perform?
The primary actions of this muscle include the stabilization, depression, abduction or protraction, upward tilt, and downward rotation of the scapula. When the ribs are immobilized, this muscle brings the scapula forward, and when the scapula is fixed, it lifts up the rib cage.
Is the pectoralis major superficial or deep?
The pectoralis major is the most superficial muscle in the pectoral region. It is large and fan shaped, and is composed of a sternal head and a clavicular head: Sternocostal head – originates from the anterior surface of the sternum, the superior six costal cartilages and the aponeurosis of the external oblique muscle.
What causes pectoralis minor syndrome?
Sports involving a throwing or lifting motion can also produce RSI. However, this RSI causes not only NTOS but is a major cause of NPMS. Because the pectoralis minor muscle attaches to the coracoid process of the scapula, repetitive arm and shoulder movements are the usual etiology of NPMS.
How many Scapulas do we have?
The scapula is ossified from 7 or more centers: one for the body, two for the coracoid process, two for the acromion, one for the vertebral border, and one for the inferior angle.
Why does my pectoralis major hurt?
The pectoralis major tendon is most commonly injured during an eccentric contraction – when the external force on the muscle is greater than the force that the muscle can generate – and when the arm is extended and externally (outwardly) rotated, such as when performing a bench press.
Where does the pectoral muscle attach?
The pectoralis major extends across the upper part of the chest and is attached to a ridge at the rear of the humerus (the bone of the upper arm). Its major actions are adduction, or depression, of the arm (in opposition to the action of the deltoideus muscle) and rotation of the arm forward about the axis of the body.
What are the symptoms of a torn pectoral muscle?
Classic symptoms of strain in the chest muscle include: pain, which may be sharp (an acute pull) or dull (a chronic strain) swelling. muscle spasms. difficulty moving the affected area. pain while breathing. bruising.
How do you train your pectoralis major?
Dumbbell Chest Flyes With a slight bend in your elbows, lower your arms out at both sides in a wide arc until you feel a stretch in your chest. Bring your arms back up, squeezing your chest muscles. Repeat. Make sure to keep arms stationary throughout the exercise; the movement happens at the shoulder joint.
Does the pectoralis major extend the shoulder?
Actions of Pectoralis Major Muscle: Flex the arm at the shoulder (glenohumeral) joint. Extends the arm at the shoulder (glenohumeral) joint from a flexed position.