It's probably best not to compare human and chimp ROM, since that has less to do with muscle attachment sites, and isn't really that consistent, joint to joint.

It's probably best not to compare human and chimp ROM, since that has less to do with muscle attachment sites, and isn't really that consistent, joint to joint. For example, a chimp shoulder has fabulous overhead ROM... as expected for a tree climber and swinger. The flip side of having crappier levers for force, is that we have better levers for precision.