In a message dated 11/1/99 8:02:57 PM Central Standard Time, [log in to unmask] writes: << about one third of the way down this paragraph, it seems to have an error. the word "bradycardia" is used for slow movement. but, bradycardia is slow pulse i believe. >> Joe, At some risk of insulting your intelligence by being longwinded about nuances that you find intuitively obvious after casual observation, first, you are correct. Second, "brady" of course, means slow. A gathering of off Parkies could be known as a "Brady Bunch" because of slowness . The brady prefix can be used to describe any number of slow processes: kinesia (slow body movement) phrenia (slowness of thought), and cardia -(heart) are three that easily come to mind. IMHO, this error might have occurred by two ways. 1. Since the advent of PCs with word processors, almost everybody writes everything on one of these. Sometimes the spell checker will offer a word just slightly different in spelling from the desired one. 2. It is possible that a human editor, operating from ignorance, could have done he same thing thinking he knew what the author wanted to say. Still, you are talking about the Merck Manual ,. It shouldn't have been there. WHH