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Trapezius

Description

Origin :

 

        • Medial third of superior nuchal line; external occipital protruberance, nuchal ligament and spinous processes of C7 – T12 vertebrae.

       

       

 

 

Insertion :

 

        • Lateral third of clavicle, acromion and spine of scapula.

       

       

 

 

Innervation :

 

        • Spinal root of accessory nerve (CN XI) (motor) and cervical nerves (C3 and C4) (pain and proprioception).

       

       

 

 

Arterial Supply :

 

        • Transverse certical artery.

       

       

 

 

Depth :

 

        • Superficial

       

       

 

 

Action

Action :

 

        • Elevates, retracts and rotates scapula

       

       

 

 

        • Superior fibers elevate

       

       

 

 

        • Middle fibers retract

       

       

 

 

Target Muscles Target MusclesTrapeziusmuscles