SNIPPED I too experience the jolt you mention when falling asleep at night, but >I don't think it comes under the heading of dyskenesia, perhaps someone >else on the >list may be able to explain this. >Nigel, 44/11 I'm guessing that you refer to "myoclonic jerks" which are common "on the edge of sleep". Peter also has them at other times on occasion, but they have nothing to do with PD--if that's what they are. Tabers medical Encyclopedia defines these as " twitching or clonic spasm of a muscle of group of muscles". A clonic spasm is defined as "spasm marked by muscular rigidity and then relaxation". I've also gotten them for years when about to fall asleep. Camilla Flintermann, CG for Peter 81/70/55 Oxford, Ohio http://www.newcountry.nu/pd/members/camilla/one.htm <[log in to unmask]> "Ask me about the CARE list for Caregivers of Parkinsonians ! "