Hi, After 3 years living with a PD diagnosis, my husband's new dr believes he has PSP. I have read some info about this, but wonder how a definite diagnosis could be made. It seems from what I read that PSP is worse than PD. I pray the dr is wrong, but we would like to know for sure. He has never fallen backwards, but has very poor balance and falls -almost in slow motion-forwards often. Very stooped, slurred speech, sudden downward spiral this past summer. He has Botox for bladder issues, so has to catherize himself each time he needs to empty his bladder. Has an awful issue with constipation. Takes Sinemet CR, and uses a Neupro patch for stiffness -especially in his neck. Advice, anyone? He doesn't want to read anything or hear anything about what could be coming. Says he will find out when "it" gets here. Should I ask the dr for an MRI? Will that give a definite diagnosis?