The new Cisco IOS Firewall for Internet Protocol version 6 (IPv6) provides stateful inspection to both existing IPv4 and IPv6 traffic on a single interface for enhanced performance, along with better management of the IPv6 migration process.
Causes of Muscle contractions that are rare. The offical US government definition of a rare disease is one that affects 200,000 people or less. The following causes of Muscle contractions appear in the population at a rate of less than 200,000 people per year in the USA: 1  Alpers Syndrome-involuntary muscle contraction. 2  Fahr's Syndrome-athetosis. 3  Ramsay Hunt syndrome Type II-involuntary muscle contraction.
RLS is different from simply wanting to shake your leg a lot while sitting. In order to be officially diagnosed, you must have all of the following, says the Restless Legs Syndrome Foundation: A strong, sometimes irresistible, urge to move your legs.en percent of Americans suffer from Restless Leg Syndrome (RLS), an under-diagnosed neurological disorder that causes creepy-crawly, tingling, aching, burning sensations in the calves, thighs, feet and even arms.