What is 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 two pectoralis major muscles, commonly referred to as the ‘pecs,’ are the muscles that create the bulk of the chest.Click to see full answer. Similarly, what does the pectoralis major muscle do?The…
The pectoralis major muscle is a large muscle in the upper chest, fanning across the chest from the shoulder to the breastbone. The two pectoralis major muscles, commonly referred to as the ‘pecs,’ are the muscles that create the bulk of the chest.Click to see full answer. Similarly, what does the pectoralis major muscle do?The pectoralis major has four actions which are primarily responsible for movement of the shoulder joint. The first action is flexion of the humerus, as in throwing a ball underhand, and in lifting a child. Secondly, it adducts the humerus, as when flapping the arms.Furthermore, what are the attachments of the pectoralis major? Attachments of Pectoralis Major Muscle: Origin & Insertion Origin: (proximal attachments) a. Clavicular head: medial half of the clavicle. b. Insertion: (distal attachments) a. Lateral lip of the intertubercular (bicipital) groove of the humerus. b. Clavicular head: Sternal head: Both heads working together: Similarly, what is the origin of pectoralis major? The pectoralis major consists of two heads. One of the heads is called the clavicular head, which originates on the inside part of the clavicle (collarbone). The other head is called the sternal head, and it originates from three different areas, which include: Outside border of the sternum (breast plate)What is the difference between pectoralis major and minor?These two muscles that overlap are supposed to glide over each other with distinction. Pectoralis minor moves from the back to the front of the body while pectoralis major moves from the outside to the inside in the front plane of the body.
