The trapezius muscle plays a big role in the athleticism of the forelimbs, as Gillian Higgins explains {} Horse & Hound. Subscribe ... Ref: Horse & Hound; 28 April 2016.

Three muscle groups are used for a horse’s topline. They are: Thoracic Trapezius — attaches the neck and mid back vertebrae to the shoulder blade; Longissimus Dorsi — this is attached to the ...

The trapezius, traps, trapezoid muscle is in the upper back and helps the neck, shoulders, and arms move. Learn more about the causes and treatment of trapezius pain.