## 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.
visible depression over the scapular spine and upper neck; scapula more prominent; reduced forelimb swing; may follow ill-fitting collars or trauma
## 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.
visible depression over the scapular spine and upper neck; scapula more prominent; reduced forelimb swing; may follow ill-fitting collars or trauma