How is shoulder blade function assessed?

If the shoulder blade (scapula) isn't sitting properly on the trunk at rest, it probably isn't working correctly when the arm is moving. There are five landmarks I look for in assessing shoulder blade function. The first two address how the shoulder blade is resting when the arm is down.

In this situation, I like to see how low and far from the spine the shoulder blade is sitting. Then I observe how the scapula looks when the arm is reaching up. In particular, I'm interested in seeing if it has rotated, elevated, and slid out far enough to support the arm in the air.

Remember, the shoulder blade is supposed to function as a foundation from which the arm moves and works when it is elevated.

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