I'm a struggling Photoshop Elements 6 learner. I'm always on the prowl for ways to level the learning curve so I subscribed to several Photoshop blogs. One that popped up today offers brushes (which I'm not really sure what they are but think they're something like virtual rubber stamps) of "... a mix of drawings (apparently drawn by Leonardo da Vinci...) and photos of 18th century wax anatomy sculptures (from Florence's Museo La Specola). Perhaps not for the very faint hearted, but interesting nonetheless."
I saw them mentioned on The Photoshop Blog. The brushes are being offered by a designer in France, who asks only that you link back to her when you use her brushes. In addition to these she also has a couple sets of skulls and bones, and a lot of non-anatomical sets too.
If only I could figure out how to show those brushes in this post.