trapezius muscle

      large, superficial muscle at the back of the neck and the upper part of the thorax, or chest. The right and left trapezius together form a trapezium, an irregular four-sided figure. It originates at the occipital bone at the base of the skull, the ligaments on either side of the seven cervical (neck) vertebrae (ligamentum nuchae), and the seventh cervical and all thoracic vertebrae. It is inserted on the posterior of the clavicle (collarbone) and on the spine of the scapula (shoulder blade). Its chief action is support of the shoulders and limbs and rotation of the scapula necessary to raise the arms above shoulder level.

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Universalium. 2010.

Look at other dictionaries:

  • Trapezius muscle — This article is about the human skeletal muscle. For the trapezius muscles found in cats, see trapezius muscles (cat). Trapezius trapezius …   Wikipedia

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  • trapezius muscle — musculus trapezius …   Medical dictionary

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  • muscle system, human — Introduction   the muscles of the human body that work the skeletal system (skeletal system, human), that are under voluntary control, and that are concerned with movement, posture, and balance. Broadly considered, human muscle like the muscles… …   Universalium

  • Trapezius muscles (cat) — The Trapezius muscles are a set of muscles found in mammals. In the cat they are three thin flat muscles that cover the back, and to a lesser extent, the neck. They pull the scapula toward the mid dorsal line, anteriorly, and… …   Wikipedia

  • trapezius — noun either of two flat triangular muscles of the shoulder and upper back that are involved in moving the shoulders and arms • Syn: ↑trapezius muscle, ↑cowl muscle, ↑musculus trapezius • Hypernyms: ↑skeletal muscle, ↑striated muscle …   Useful english dictionary

  • Muscle — is the tissue of the body which primarily functions as a source of power. There are three types of muscle in the body. Muscle which is responsible for moving extremities and external areas of the body is called "skeletal muscle." Heart… …   Medical dictionary

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