I have had 3 different operations on my neck all fusions the first 2 were with my own bones however this third one was the whopper of all replaced c4 thru c7 w/ cadaver bone plates and screws my rom has been signifiganlty compromised and constant pain .But my main concern is the horrible dreams I have been having. Does anyone know anything about residue effect w/ cadaver bones These dreams are scary and not at all like any thing Ive ever experienced Thanks for any help given. Grafted