Share: Cervical dystonia (say: serv-ical dis-tone-ee-a) is a condition in which the muscles in the neck contract, twisting the head to one side and pulling the chin to the shoulder.Sometimes the shoulder on the affected side will also be pulled up toward the head.hare: Cervical dystonia (say: serv-ical dis-tone-ee-a) is a condition in which the muscles in the neck contract, twisting the head to one side and pulling the chin to the shoulder.
How do scientist classify air masses? Scientists classify air masses according to their general characteristics and latitude. Artic air masses form at around 60 degrees latitude, Polar masses are at around 40 â¦ degrees latitude, warm tropical air masses are at 15 degrees latitude and very hot air masses form near the equator.
Continental polar or continental arctic air masses are marked by surface high pressure, cold temperatures, and low dew points. * Maritime polar (mP) air masses are cool, moist, and unstable. Some maritime polar air masses originate as continental polar air masses over Asia and move westward over the Pacific, collecting warmth and moisture from the ocean. Some mP air masses originate from the North Atlantic and move southwestward toward the Northeast States. The latter air mass ...