The model which is described herein can be located at http://home.cfl.rr.com/rtgroup/successful-curve-test-with-head-003.blend.
Pressing alt+A will play the animation along the paths and the strictly horizontal motion of the hands may be noted. When the hands come together near the chin (end of path) the forearms should meet in front of the body.
Rotating the shoulder IK bones forward when the animation is near the end of the path will cause the forearms to come together as desired.
My question is this: I’m already using path animation. But inserting a frame where the shoulder IKs rotate would require keyframing. Can these two types of animation be combined?