I found the correct spelling of the term as well as its Greek origin. akathisia - from the prefix "a" meaning not (as in "atonal"), and "kathikso", to sit down. Unfortunately, this denotes an action, not a sensation, so it doesn't express the real meaning. It's frustrating not only to experience this sensation, but also to have to describe it to people who never themselves felt it, and that is the vast majority, a good number of doctors included. It's one of those weird, not right sensations that we may have trouble finding adequate words for when we are trying to say what's wrong with us. I recall once having a different, non PD related, weird sensation (too much insulin), which I could not describe in such a way as to convey that there was anything wrong with me except in my imagination. There seem to be standard terms for describing many of the symptoms which are subjective sensations, in this case, "restlessness" or "akathisia", and if we don't happen to use the right words, we may not be heard. It pays to learn and use the vocabulary of one's condition. Phil T.