Snoopy - Thanks for posting that link. That was very helpful.

Ellie - I am terribly sorry to hear about your friend. How scary for both of you. He is very lucky to have you in his life. After reading your thread in the introductions, I now understand why he would have Lhermitte's sign. I'm not sure how long ago the accident/surgery took place. He really needs to contact the surgeon who performed the surgery as well as his neurologist. Scar tissue may be developing or there is some sort of postop swelling occurring or it could be from something else. I hope this is more helpful to you than my previous response. Saying some healing prayers for your friend.