Shoulder Girdle or Shoulder Complex?

What is the shoulder girdle or shoulder complex? Is there a difference when you use these two different words when it comes to the shoulder?

Anatomical structure of human shoulder complex (see online version

Glenohumeral (Shoulder) joint: Bones, movements, muscles

Shoulder Joint Complex - ppt video online download

Shoulder Joint: Anatomy Concise Medical Knowledge

Guide to Shoulder Anatomy

anatomy and biomechanics of Shoulder joint

Anatomy, Pathology & Treatment of the Shoulder Joint - Articles

Stability of the Shoulder Complex during Manual Exertions

Biomechanics of the Shoulder - Physiopedia

Allison's MyoTherapeutics, LLC

Basic Anatomy of the Shoulder — ACRO Physical Therapy & Fitness