trapezius muscle


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tra·pe·zi·us mu·scle

(tră-pē'zē-ŭs mŭs'ĕl)
Origin, medial third of superior nuchal line, external occipital protuberance, ligamentum nuchae, spinous processes of seventh cervical and the thoracic vertebrae and corresponding supraspinous ligaments; insertion, lateral third of posterior surface of clavicle, anterior side of acromion, and upper and medial border of the spine of the scapula; action, when scapulae are fixed, portions of muscle can act independently: cervical portion elevates scapula, thoracic portion contributes to depression of scapula; upper and lowermost portions act simultaneously to rotate glenoid fossa superiorly; when the entire muscle and especially its middle part contracts, the scapulae retract; draws head to one side or backward; nerve supply, motor by accessory, sensory by cervical plexus.
Synonym(s): musculus trapezius [TA] , trapezius.

trapezius muscle

Neck and back muscle. Origin: occipital bone (superior nuchal line), nuchal ligament, spinous processes of vertebrae C7-T12. Insertion: posterior edge of lateral clavicle, acromion, posterior edge of spine of scapula. Nerve: accessory (CN XI), spinal C3-C4. Action: elevates, retracts, and rotates scapula.
See: face and headfor illus.
See also: muscle

trapezius muscle

A large, triangular back muscle extending from the lower part of the back of the skull (occiput) almost to the lumbar region of the spine on each side. Each muscle extends outward from the rear processes of the vertebral column to the spine of the shoulder blade and the outer tip of the collar bone (clavicle). The trapezius muscle braces the shoulder blade and rotate it outwards when the arm is raised.
References in periodicals archive ?
In all patients, the strength of the trapezius muscle preoperatively was 4 and above as per MRC grading.
in 2001 reported a case involving an 11-year-old boy with a posteriorly displaced fracture of the distal clavicle and anchoring of the medial end of the clavicle into the trapezius muscle fibers that required surgical intervention [10].
The lesion is situated posterolateral to right sternocleidomastoid muscle, lateral to right carotid and jugular vessel and right scalene muscle anterior to right trapezius muscle and posterosuperior to clavicle and subclavian vessel suggestive of possible lymphangioma.
These postures, combined with recurring movements, lead to fatigue of the trapezius muscles.
Bipolar (Ag/AgCl) gold plated reusable electrodes were placed on the left Trapezius muscle.
Scapular muscle recruitment patterns: Trapezius muscle latency with and without impingement symptoms.
Strain of the trapezius muscle, which extends to the shoulder from the spine and keeps the head upright.
He started feeling some tightness in the trapezius muscle in his right shoulder.
It's perfect for incorporating the trapezius muscle (upper back) to produce great-looking shoulders and even better posture.
5 cm in diameter for trapezius muscle, 2 locations 3.
16 Support to forearms and wrists while working on keyboard and input device was proposed as a preventive measure as it decreases muscle activity in the trapezius muscle and, hence, reduces shoulder pain.
It was the trapezius muscle which played a vital role in Lisa's recovery by supporting her unstable spinal column without the need for surgery.