Musculus trapezius pars cervicalis
The trapezius cervicis is the cervical portion of the trapezius. It covers the upper lateral neck from the nuchal ligament to the spine of the scapula. It originates from the funicular part of the nuchal ligament from the poll to the withers and inserts on the spine of the scapula (cranial half). Its actions are to elevate the scapula, swing the scapula cranially, and stabilize the shoulder. It is innervated by the accessory nerve (cranial nerve XI).
Origin: Funicular part of the nuchal ligament from the poll to the withers
Insertion: Spine of the scapula (cranial half)
Action: Elevates the scapula; swings the scapula cranially; stabilizes the shoulder
Innervation: Accessory nerve (CN XI)
Isolated injury is uncommon. Relevant in evaluations of scapular mobility and neck function. Dysfunction can contribute to reduced scapular elevation.
## Overview Trapezius atrophy, sometimes grouped under the broader term sweeny, results from damage to the accessory nerve that supplies the trapezius. It creates a visible depression over the scapul
Persistent scapular asymmetry or reduced neck mobility after trauma should be evaluated. Correct saddle fit helps protect the region.
## Overview Trapezius atrophy, sometimes grouped under the broader term sweeny, results from damage to the accessory nerve that supplies the trapezius. It creates a visible depression over the scapular spine and upper neck, making the scapula more prominent and reducing forelimb swing. Ill-fitting collars or shoulder trauma are common causes. ## Causes Accessory nerve damage from trauma or collar pressure. ## Diagnosis Visual atrophy and neurologic examination. ## Treatment Time and removal of the inciting cause. Most improve functionally, though some hollowing may remain. ## Recovery and Prognosis Fair to good for function. ## Prevention Proper collar fit and trauma avoidance. Signs include: visible depression over the scapular spine and upper neck; scapula more prominent; reduced forelimb swing; may follow ill-fitting collars or trauma
Isolated injury is uncommon. Relevant in evaluations of scapular mobility and neck function. Dysfunction can contribute to reduced scapular elevation.
Persistent scapular asymmetry or reduced neck mobility after trauma should be evaluated. Correct saddle fit helps protect the region.
See the Trapezius Cervicis on our interactive 3D horse model. Open 3D Model