I must put an end to this obsession with sloping shoulders. It is only made worse by the daily bombardment of pictures of the naked clavicles of current fashion
This time, with the help of Google Books, I found an explanation in A Handbook of Anatomy for Art Students by Arthur Thomson
I should have known it would take an artist to teach me how to see
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The clavicle – the one part of the female anatomy that is fat-proof throughout her life - Lisa Armstrong