The pectoralis major muscle occupies a large area on the anterior chest wall and its function consists basically of providing adduction and medial rotation of the shoulder4 6 7 It is traditionally divided into two portions. Either of two muscles on each side of the upper and anterior part of the thorax the action of the larger pectoralis major assisting in drawing the shoulder forward and rotating the arm inward and the action of the smaller pectoralis.
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In females this important muscle is spread underneath the breast.
R PECTORALIS. ˌpɛk təˈræl iz -ˈreɪ liz -ˈrɑ-. Pectoralis Muscle Stretch - YouTube. A well-developed pectoralis major is.
Pectoralis Major is a very powerful muscle that forms the prominence of the chest. The two pectoralis major muscles commonly referred to. It then enters the deep surface of the pectoralis minor muscle where it divides into a number of.
The topic Absence of Pectoralis Muscle due to Poland Syndrome you are seeking is a synonym or alternative name or is closely related to the medical condition Poland Syndrome. It contains four muscles that exert a force on the upper limb. Noun plural pectorales pek-tuh-ral-eez -rey-leez -rah-.
It passes behind the first part of the axillary artery curves forward between the axillary artery and vein and unites in front of the artery with a filament from the lateral nerve. This video demonstrates an effective stretch for the chest muscles or the pectoralis muscles. It moves the shoulder forwards and across your chest.
The number of costal attachments and the extent to which the individual heads and segments are separated may vary. The pectoralis major may partially fuse with the deltoid muscle. It is this muscle that you develop with the bench press exercise.
Pectoralis major fibers from the right or left side of the chest may decussate across the sternum and manifest clinically as a palpable mass. The pectoralis major is the superior most and largest muscle of the anterior chest wall. The Pectoralis Major attaches to the upper arm bone humerus bone and has two parts.
TRICEPS - R Triceps brachii lateral head - R Triceps. In this article we shall look at the anatomy of the muscles of the pectoral region. The pectoralis major muscle is a large muscle in the upper chest fanning across the chest from the shoulder to the breastbone.
CHEST - R Pectoralis major. The pectoralis major pectoralis minor serratus anterior and subclavius. Absence or abnormality of the pectoralis major muscle a major chest muscle that normally attaches to the upper arm on one side and the breastbone or sternum on the other side.
Pectoralis major tendon repair is an effective treatment that results in a high rate of return to sport and work pain relief and improved cosmetic appearance albeit with a significant rate of complication. The pectoralis major is the most important thick and fan-shaped muscle that is situated at the anterior part of the chest in a male human body. The pectoral region is located on the anterior chest wall.
The pectoralis minor acts to stabilize the scapula by drawing it anteroinferiorly on the thoracic wall. The anlage of the pectoralis muscles is situated above the first rib in the ventral lateral extensions of the cervical myotomes 9. The evidence supporting all outcomes was limited by the rarity of the injury the variable.
As the embryo develops the premuscle mass enlarges and moves downward becoming attached first to the clavicle then to ribs sternum and abdominal fascia and at the same time becoming differentiated into the major and minor pectoral muscles. The medial pectoral nerve arises from the medial cord of the brachial plexus and through it from the eighth cervical and first thoracic roots. Find yourself a door frame and position the elbows just below.
The pectoralis minor is also an accessory respiratory muscle that can act to elevate the upper ribs during periods of respiratory distress. Its origin lies anterior surface of the medial half of the clavicle the anterior surface of the sternum the first 7 costal cartilages the sternal end of the sixth rib and the aponeurosis. Both muscles receive innervation from the medial and lateral pectoral nerves.
It is a thick fan-shaped muscle that lies underneath the breast tissue and forms the anterior wall of the axilla.
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