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Pectoralis Major: a skeletal muscle that adducts and rotates the arm
Source: WordNet 2.1
Pectoralis Major: The pectoralis major is a paired muscle found in the upper anterior chest area that helps to give shape to the breasts. The pectoralis major originates from the clavicle, sternum and the external oblique muscles and inserts on the humerus. The pectoralis major includes upper, middle, and lower fibers. As a whole, the pectoralis major adducts, medially rotates the humerus. Individual groups of fibers also flex and extend the humerus. These motions are needed for such activities as doing push-ups, arm wrestling, and lifting a toddler. The pectoralis major is innervated by the lateral pectoral nerve and the medial pectoral nerve.
Conditions that can afflict the pectoralis major include rupture of the pectoralis major tendon, myalga, repetitive strain injury, tears, strains, myopathy, atrophy, infectious myositis, neuromuscular diseases, lacerations and contusions.
The following organs are closely related to the organ: Pectoralis Major:
The following conditions are related to the organ: Pectoralis Major:
The following are other names for the organ: Pectoralis Major:
The following list contains sub-parts of the organ: Pectoralis Major:
These symptoms are related to afflictions of the organ: Pectoralis Major:
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