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 :
Edit. According to director Peter R. Hunt, John Richardson was briefly considered to take the part of James Bond in On Her Majesty's Secret Service (1969) (other actors considered include: Adam West, Robert Campbell, Anthony Rogers, Hans De Vries, John Richardson and Roy Thinnes).The part went to George Lazenby.is big success was Don Chaffey 's One Million Years B.C. (1966) with Raquel Welch, produced by Hammer films. Later, following the steps of some other actors, he went on to appear in various Italian movies such as Umberto Lenzi 's horror ...