Forgot to mention, a recumbent with a properly fitted neck rest would help. They make them in 2, 3, and 4 wheels. With or without suspension. Narrow or wide tires.
The key advantage of supporting your head in a reclined position ot prolonging adjacent disc degeneration. With three fused vertebrae, the unfused adjacent joints bear a heavier than normal load and tend to cause problems down the road. This is something to discuss with a surgeon. I have spoken to about 10 of these guys and except for the Europeans who would do articifical discs on me, they all warned me of adjacent disk degneration.