Here is an arm anatomy study created for use in realtime virtual reality applications. This study was created with the help of anatomists and using various sources such as Gray's anatomy and Netter's Atlas of Human Anatomy - it includes all bones and muscles found in the arm, along with the major neurovascular structures. I hope you find it useful!
The skin of the arm was adapted from a scan, as were a couple of the bones. The rest of the study was created from scratch in Zbrush, retopologized and unwrapped in Maya and then baked and textured in Substance 3D Painter. All muscle and bone materials are custom created by myself from scratch. Rendered out in Marmoset Toolbag 4 and labels placed using Photoshop.