Some time ago, I asked Robb's neurosurgeon to describe, visually, the path of Robb's recovery. Would it be a long, steady slope? Would it be like a staircase, with plateaus followed by big steps up?
He said that it would be more like an oscillating wave, with improvements and setbacks.
It seems that we are in one of the down turn parts of the wave. Robb's energy is very low, lately. He is experiencing back pain, which he almost never does. Robb is dragging.
Luckily, we were prepared for this, and are not despairing.