paramyotonia congenita [´par·ǝ´mī·ǝ`tō·nē·ǝ kǝn`jen·ǝd·ǝ] MEDICINE A heredofamilial condition characterized by recurrent muscular stiffness and weakness (myotonia) on exposure to cold, as well as on mechanical irritation; transmitted as an autosomal dominant and considered to be a variety of the hyperkalemic form of periodic paralysis. Also known as Eulenburg's disease; myotonia congenita intermittens. |