In 1980 Alberca et al. described a patient with a syndrome of increased muscle irritability, who presented ondulating muscle rolling movements and electrically silent cramps, myoedema and muscle reactions to mechanical stimulation similar to myotonic response, suggesting a disfunction at myofibrillar level.
For c-3po, it was a costume, Anthony Daniels played c-3po: For R2-D2, It was a costume and a remote controlled robot. CGI was also used in the prequel trilogy. So, they had Kenny Baker to play him : And from Portrayal section of wookieepedia article on R2-D2 :
Watson also guest starred in an episode of The Mentalist (Carnelian, Inc., March 2009), and in the Castle episode Punked (October 2010). Since 2006, he has appeared as a recurring cast member on NCIS as Agent Leroy Jethro Gibbs 's mentor and former superior Mike Franks.Watson also gave a performance with Jennifer Love Hewitt as a special guest on Saturday Night Live (1998), parodying his role in I Know What You Did Last Summer.use Watson (born July 20, 1948) is an American stage and screen actor.