Spinal Tap

Hi, just wanting to know of anyone has had a spinal tap?  

I have been having a number of problems for 2 months and I am currently awaiting a date when I will be going into hospital for a few days to have the tap and other tests CT etc.

I have already had an MRI which showed changes in my lumbar spin, they didn't explain what those changes but they did confirm it was not chnages in the bones, there weren't any prolapsed discs ete either.  

I have lost all sensation in my left leg, groin, back and this has been like this now for 2 months. I also have tinnitus in my left ear and a weakness in my left arm.

Can anyone advise me why they would be doing a spinal tap? And/or advice about what could be causing this left sided numbness.  I am normally a very fit and active 30 year old women.

Thank you

[patbchln]

I have had a spinal tap best bet os dont move for about 3 hours at least after there done )even if u think u can) u will get really sick!!!