Definition of Trapezius

1. Noun. Either of two flat triangular muscles of the shoulder and upper back that are involved in moving the shoulders and arms.

Definition of Trapezius

1. Noun. (anatomy) A large vertebrate skeletal muscle divided into an ascending, descending, and transverse portion, attaching the neck and central spine to the outer extremity of the scapula; it functions in scapular elevation, adduction, and depression. ¹

¹ Source:

Definition of Trapezius

1. a triangular muscle on the back [n -ZIUSES or -ZII]

Medical Definition of Trapezius

1. 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 middle part contracts, the scapulae retract; draws head to one side or backward; nerve supply, motor by accessory, sensory by cervical plexus. Synonym: musculus trapezius, cowl muscle, trapezius. (05 Mar 2000)

Trapezius Pictures

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Lexicographical Neighbors of Trapezius

trapeze dresses
trapezium bone
trapezius (current term)
trapezius muscle
trapezoid body
trapezoid bone
trapezoid bones
trapezoid ligament
trapezoid line
trapezoid ridge

Literary usage of Trapezius

Below you will find example usage of this term as found in modern and/or classical literature:

1. Anatomical Technology as Applied to the Domestic Cat: An Introduction to by Burt Green Wilder, Simon Henry Gage (1882)
"Its caudal portion is covered by the skin; its dorso-cephalic angle is overlapped by the spino-trapezius, but exposed in Fig. 67. ..."

2. Anatomy, Descriptive and Applied by Henry Gray (1913)
"The muscles of this group are: trapezius. Rhomboideus major. ... At its occipital origin, the trapezius is connected to the bone by a thin fibrous lamina, ..."

3. Duval's Artistic Anatomy: Completely Revised, with Additional Original by Mathias Duval, Andrew Melville Paterson (1907)
"Deep muscles visible in relation to the trapezius and latissimus dorsi— I, lateral region of neck (splenius and complexus muscles); 2, region of the scapula ..."

4. The London Medical Gazette (1841)
"The trapezius and rhomboid muscles of the convex side could be felt as a thick mass ... I proposed the division of part of the trapezius and the rhomboid ..."

5. Cunningham's Manual of Practical Anatomy by Daniel John Cunningham, Arthur Robinson (1914)
"Trace it upwards to its termination, and downwards to the point where it pierces the deep fascia covering the trapezius. At a still lower level look for the ..."

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