The Shoulder Girdle: Function & Issues
Anatomy & Physiology
Overview
In this lesson, we explore the function of the shoulder girdle, including scapular movements, common postural issues, and practices for maintaining healthy shoulders.
Objective
Understand how the shoulder girdle supports arm mobility and stability, and gain insight into the anatomical patterns behind common shoulder problems.
What You'll Get
You'll learn to recognize the six basic arm movements and four scapular actions that show up in your practice—from lifting your arms overhead to applying force in Chaturanga. Beyond the mechanics, you'll understand why modern life creates slumped shoulders and a forward head, what the serratus anterior does (and why it's often both tight and weak), and what practices support long-term shoulder health. For teachers and therapists, this gives you the language and insight to cue intelligently. For your own body, it's a roadmap to moving with less pain and more freedom.
Questions Answered Here
- What is the function of the shoulder girdle?
- Describe four movements of the scapulae and give examples of each.
- What six arm movements are made possible by the shoulder girdle’s mobility? Give examples of each.
- Name some potential shoulder injuries.
- What two factors are often considered keys to understanding potential issues and how to keep the shoulder joint safe?
- What common aspects of modern life may cause issues with the shoulder girdle?
- Describe the anatomy behind a forward head and slumped shoulders.
- Describe the serratus anterior muscles and their function.
- Why are the serratus muscles often tight and weak?
- Describe practices for healthy shoulders.
Function & Movements
- The shoulder girdle gives the arms support, mobility and stability for such movements as raising and lowering the arms in Urdhva Hastasana(Upward Salute) or applying force as in Chaturanga Dandasana (Four Limbed Staff Pose).
- The direction and quality of arm movement is determined by muscles that form a bridge between the shoulder and the arm bone. If some muscles are tight, for example, the arm bone can rotated internally as we see in a slumping posture.
The movement of your shoulder is actually quite complex; it’s not just those two bones moving relative to one another. Instead, when your arm bone moves in different directions, the shoulder blade slides and glides around on your back and side rib cage, too. Although this makes the shoulder joint’s movements more complex than the hip joint, the shoulder has the same six basic movements, which can be combined in various ways. – Baxter Bell
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