Trapezius

Parent Structures

• Muscles of the Shoulder

Proximal/Superior Attachment

• External Occipital Protuberance
• Ligamentum Nuchae
• Spinous process of 10th Thoracic Vertebrae
• Spinous process of 11th Thoracic Vertebrae
• Spinous process of 12th Thoracic Vertebrae
• Spinous process of 1st Thoracic Vertebrae
• Spinous process of 2nd Thoracic Vertebrae
• Spinous process of 3rd Thoracic Vertebrae
• Spinous process of 4th Thoracic Vertebrae
• Spinous process of 5th Thoracic Vertebrae
• Spinous process of 6th Thoracic Vertebrae
• Spinous process of 7th Cervical Vertebrae
• Spinous process of 7th Thoracic Vertebrae
• Spinous process of 8th Thoracic Vertebrae
• Spinous process of 9th Thoracic Vertebrae
• Superior Nuchal Line - Medial Third
• Supraspinous Ligament - Between C7 and T12

Distal/Inferior Attachment

• Acromion - Medial Border of the Acromion
• Clavicle - Posterior Border of the Lateral Third of the Clavicle
• Spine of the Scapula - Upper Border of the Crest of the Spine of the Scapula
• Tubercle of the Spine of the Scapula - Inferior Edge

Joint Actions

• Agonist
  • Scapulothoracic
    • Depression - Lower Fibers
    • Elevation - Upper Fibers
    • Lateral/External Rotation
    • Retraction