Podcast
Questions and Answers
What is the origin of the clavicular head of the pectoralis major muscle?
What is the origin of the clavicular head of the pectoralis major muscle?
Which nerve supplies the pectoralis major muscle?
Which nerve supplies the pectoralis major muscle?
Where does the pectoralis major muscle insert?
Where does the pectoralis major muscle insert?
What is the action of the pectoralis major muscle?
What is the action of the pectoralis major muscle?
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Which muscle is pierced by the medial pectoral nerve to enter deep surface of pectoralis major muscle?
Which muscle is pierced by the medial pectoral nerve to enter deep surface of pectoralis major muscle?
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Which muscle in the pectoral region has two heads, one originating from the clavicle and the other from the sternum and costal cartilage?
Which muscle in the pectoral region has two heads, one originating from the clavicle and the other from the sternum and costal cartilage?
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What is the nerve supply for the pectoralis minor muscle?
What is the nerve supply for the pectoralis minor muscle?
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The pectoral fascia is attached to which structures overlying the pectoralis major muscle?
The pectoral fascia is attached to which structures overlying the pectoralis major muscle?
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Which muscle in the pectoral region is responsible for protraction of the scapula?
Which muscle in the pectoral region is responsible for protraction of the scapula?
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What is the insertion point of the pectoralis major muscle?
What is the insertion point of the pectoralis major muscle?
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Study Notes
Pectoralis Major Muscle
- The clavicular head of the pectoralis major muscle originates from the medial half of the clavicle.
- The pectoralis major muscle is supplied by the medial and lateral pectoral nerves.
- The pectoralis major muscle inserts into the lateral lip of the intertubercular groove of the humerus.
- The action of the pectoralis major muscle is to adduct, flex, and rotate the humerus medially.
Pectoral Region
- The medial pectoral nerve pierces the pectoralis minor muscle to enter the deep surface of the pectoralis major muscle.
- The pectoralis major muscle has two heads, one originating from the clavicle and the other from the sternum and costal cartilage.
- The pectoralis minor muscle is supplied by the medial pectoral nerve.
- The pectoral fascia is attached to the clavicle, sternum, and costal cartilage, overlying the pectoralis major muscle.
- The pectoralis major muscle is responsible for protraction of the scapula.
- The pectoralis major muscle inserts into the lateral lip of the intertubercular groove of the humerus.
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Description
Test your knowledge of the muscles in the pectoral region and back with this quiz. Learn to identify the origin, insertion, actions, and nerve supply of each muscle in these areas.
