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The pectoral muscles, commonly referred to as pecs, are a vital component of the upper body musculature. They are located on the anterior chest wall and play a crucial role in various movements, including pushing, lifting, and stabilising the shoulders and arms. There are two pectoral muscles on each side of the sternum (breastbone): the pectoralis major and the pectoralis minor. The pectoralis major is the most superficial muscle in the pectoral region, and it constitutes the bulk of the chest muscles, lying underneath the breast.
| Characteristics | Values |
|---|---|
| Location | Anterior chest wall |
| Muscles | Pectoralis major, pectoralis minor, serratus anterior, subclavius |
| Shape | Fan-shaped |
| Composition | Two heads: clavicular head and sternal head |
| Function | Pushing, lifting, stabilising the shoulders and arms |
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What You'll Learn
- The pectoralis major is the most superficial muscle in the pectoral region
- The pectoralis major is fan-shaped and originates from multiple places along the chest
- The pectoralis major is composed of a sternal head and a clavicular head
- The pectoralis minor is one of the muscles that connect the front walls of the chest with the bones of the upper arm and shoulder
- The serratus anterior is another muscle in the pectoral region
The pectoralis major is the most superficial muscle in the pectoral region
The pectoralis major is a large, fan-shaped muscle located in the chest. It constitutes the bulk of the chest muscles, lying underneath the breast. It is thick and originates from multiple places along the medial and superior chest, including the anterior sternum, clavicular head, sternal end of rib 6, superior six costal cartilages, and the aponeurosis of the external oblique. All the fibres converge and end in a flat tendon, inserting into the lateral lip of the bicipital groove of the humerus.
The pectoralis major has two heads: the clavicular head and the sternal head. The clavicular head originates from the clavicle, while the sternal head originates from the sternum and the upper ribs. The actions of the pectoralis major depend on which parts of the muscle are activated. For example, the fibres attaching to the clavicular head allow for the flexion of the humerus, as seen when lifting a glass for a toast.
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The pectoralis major is fan-shaped and originates from multiple places along the chest
The pectoralis major is a fan-shaped muscle located in the chest. It is the most superficial muscle in the pectoral region, and it constitutes the bulk of the chest muscles. The pectoralis major has two heads: the clavicular head and the sternal head. The clavicular head originates from the clavicle, while the sternal head originates from the sternum and the upper ribs. The muscle is thick and originates from multiple places along the medial and superior chest, including the anterior sternum, clavicular head, sternal end of rib 6, superior six costal cartilages, and the aponeurosis of the external oblique. All the fibres converge and end in a flat tendon, inserting into the lateral lip of the bicipital groove of the humerus. The actions of the pectoralis major are dependent on which parts of the muscle are activated. For example, the fibres attaching to the clavicular head allow for the flexion of the humerus, such as when lifting a glass for a toast.
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The pectoralis major is composed of a sternal head and a clavicular head
The pectoral muscles, commonly referred to as pecs, are a vital component of the upper body musculature. They play a crucial role in various movements, including pushing, lifting, and stabilising the shoulders and arms.
The pectoralis major is the most superficial muscle in the pectoral region. It is a large, thick, fan-shaped muscle that constitutes the bulk of the chest muscles, lying underneath the breast. The pectoralis major is composed of a sternal head and a clavicular head. The sternal head originates from the sternum and the upper ribs, while the clavicular head originates from the clavicle. The clavicular head allows for the flexion of the humerus, as seen when lifting a glass for a toast.
The pectoralis major is one of two such muscles on each side of the sternum (breastbone) in the human body, the other being the pectoralis minor. Together, these muscles connect the front walls of the chest with the bones of the upper arm and shoulder.
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The pectoralis minor is one of the muscles that connect the front walls of the chest with the bones of the upper arm and shoulder
The pectoral muscles are a vital component of the upper body musculature. They are a group of skeletal muscles that connect the upper extremities to the anterior and lateral thoracic walls. There are four muscles in the pectoral region: the pectoralis major, pectoralis minor, serratus anterior and subclavius.
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The serratus anterior is another muscle in the pectoral region
The pectoral muscles are located on the anterior chest wall. They are a vital component of the upper body musculature, playing a crucial role in various movements, including pushing, lifting, and stabilising the shoulders and arms.
The pectoralis major and pectoralis minor are the two muscles that connect the front walls of the chest with the bones of the upper arm and shoulder. The pectoralis major is the most superficial muscle in the pectoral region. It is thick, fan-shaped, and constitutes the bulk of the chest muscles, lying underneath the breast.
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Frequently asked questions
The pectoral muscles are located in the chest.
The pectoral muscles play a crucial role in various movements, including pushing, lifting, and stabilizing the shoulders and arms.
There are two types of pectoral muscles: the pectoralis major and the pectoralis minor.
