I have a lumbar peritoneal shunt that was placed in Oct.'99 to treat Pseudotumor Cerebri. In June'00 I had a shunt revision as my pressure was again elevated. In Aug.'00 my pressure again elevated. Another revison was being considered but my pressure then decreased on its own. I am experiencing syptoms that I have had post surgically after the shunt placement and revision, such as weakness, shaking arms and legs, nausea, and lowered pressure headaches. I have also been experiencing difficulty with my mood, having lots of crying spells, feelings of hopelessness, some confusion. My question is what affect does the increased pressure have on the brain and what happens when the pressure is lowered?? Can my mood and attitude be affected by this and what can be done to help. Thank you! Susan