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Encyclopedia > Trapezius
Trapezius
Trapezius

In human anatomy, the trapezius is a large superficial muscle on a person's back. For cat anatomy, please click here. Image File history File links Download high resolution version (1140x1212, 116 KB) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Image File history File links Download high resolution version (1140x1212, 116 KB) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Human anatomy or anthropotomy is a special field within anatomy. ... A top-down view of skeletal muscle Muscle is a contractile form of tissue. ... The Trapezius muscles are a set of muscles found in cats. ...


Trapezius gets its name from its trapezium-like shape; the corners being the neck, the two shoulders, and the thoracic vertebra, T12. Other uses: Quadrilateral (disambiguation) In geometry, a quadrilateral is a polygon with four sides and four vertices. ... The neck is the part of the body on many limbed vertebrates that distinguishes the head from the torso or trunk. ... In human anatomy, the shoulder joint is composed of three bones: the clavicle (collarbone), the scapula (shoulder blade), and the humerus (upper arm bone) (see diagram). ... A diagram of a thoracic vertebra. ...


A person can feel trapezius on themselves by holding a weight in front of them in one hand, and with the other, touching between the shoulder and the neck. They should feel a sheet of muscle become active.


Trapezius actually arises, down the midline, from the external occipital protuberance, the nuchal ligament, the medial part of the superior nuchal line, and the spinous processes of the vertebrae C7-T12. A ligament is a short band of tough fibrous connective tissue composed mainly of long, stringy collagen fibres. ... A diagram of a thoracic vertebra. ...


It inserts, at the shoulders, into the lateral third of the clavicle, the acromion process, and into the spine of the scapula. Left clavicle - from above Left clavicle - from below In anatomy, the clavicle or collar bone is a bone that makes up part of the shoulder girdle. ... The acromion process, or simply the acromion, is an anatomical feature on the scapula. ... Left scapula - front view () Left scapula - rear view () In anatomy, the scapula, or shoulder blade, is the bone that connects the humerus (arm bone) with the clavicle (collar bone). ...


Its muscle fibres at the neck, run downward and laterally towards the arm. The fibres from the vertebrae run upward, also towards the shoulder. A muscle fiber (American usage) or muscle fibre (British usage) is a single cell of a muscle. ...


Because the fibres run in different directions, it has a variety of actions. It elevates, retracts, adducts and rotates the scapula. The superior fibres elevate the scapula, the middle fibres retract it, and the inferior fibres depress it. When the superior and inferior fibres act together they superiorly rotate the scapula.


Trapezius's major nerve supply is the cranial nerve XI. Cervical nerves C3 and C4 receive information about pain in this muscle. The accessory nerve is the eleventh of twelve cranial nerves. ... In anatomy, cervical is an adjective that has two meanings: of or pertaining to the neck. ... A nerve is an enclosed, cable-like bundle of nerve fibers or axons, which includes the glia that ensheath the axons in myelin. ...


  Results from FactBites:
 
Trapezius - Wheeless' Textbook of Orthopaedics (564 words)
- trapezius and serratius anterior stabilize scapular base from which the arm operates;
- trapezius, which arises from spinous processes of cervical and thoracic vertebrae and inserts on spine of scapula
Transfer of the Levator Scapulae, Rhomboid Major, and Rhomboid Minor for Paralysis of the Trapezius.
Trapezius Exercises, Shoulder Exercises, Deltoid Exercises (538 words)
The trapezius (traps) muscle is made-up of three separate regions.
The upper portion of the trapezius is mainly responsible for shrugging your shoulders.
This exercise is excellent for isolating the trapezius muscles.
  More results at FactBites »

 
 

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