I have known about Chiari only since September 2006 ~ yet it seems like a lifetime. I try to stay on top of reading other chiarian blogs and doing research on the internet ~ I came across this neat picture that visually shows you what a brain tail looks like from a bone/brain perspective.
What you are looking at is the back of the head. The cerebellum is supposed to be above the foramen magnum, but a person with Chiari, like myself, has brain matter herniated down through the foragmen magnum into the spinal column. This picture shows what the head looks like after Posterior fossa decompression surgery. The surgical procedure removes bone at the back of the skull and spine so that the brain tail has more room to hang out. Well that's my attempt at a non-medical explanation anyay. I am still hoping there's room in there to request for a memory upgrade during my surgery. Maybe they could upload a kung fu program ~