Musculus trapezius pars cervicalis
The cervical portion of the trapezius, covering the upper lateral neck from the nuchal ligament to the spine of the scapula. It elevates and abducts the scapula.
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)
Damage to the accessory nerve causes denervation atrophy of the trapezius, creating a visible depression over the scapular spine.
Damage to the accessory nerve causes denervation atrophy of the trapezius, creating a visible depression over the scapular spine. Signs include: Visible depression or hollowing over the scapular spine and upper neck; scapula appears more prominent; reduced forelimb swing; may follow ill-fitting collars or shoulder trauma.
See the Trapezius Cervicis on our interactive 3D horse model. Open 3D Model