Function

The Musculus pectoralis major pulls the arm to the body (Adduktion), turns it inward (medial) and pulls it forward (inflection). In addition it belongs to the breath auxiliary musculature.

Primarily it can come to growing together with the Latissimus or the Deltoideus. Then a clear optical separation is naturally hardly possible this for muscles. These growing together are not unusual; they occur with approximately 7% of all humans.

The Musculus pectoralis major can be missing also on a side completely. This defect arises with one of 20000 children, with boy three times more than with girls. Up to now the cause is not exactly well-known, but one assumes the cause does not lie in a gene defect justified. Usually also growing together at the hand the same side arise.

The three parts of the muscle

• Pars clavicularis (key leg part)
• Pars sternocostalis (breastbone rib part)
• Pars abdominalis (bulge out-hurry)

Articles in category "Musculus pectoralis major"

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