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The wrong notch 

 •  • by Paul Ingraham
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Weekly nuggets of pain science news and insight, usually 100-300 words, with the occasional longer post. The blog is the “director’s commentary” on the core content of PainScience.com: a library of major articles and books about common painful problems and popular treatments. See the blog archives or updates for the whole site.

A nice example of anatomical variation: the size and shape of a notch in the top of the shoulder blade is quite variable, and nerve impingement is much more likely if you’ve got the wrong type of notch. More anatomical variation examples:

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