Former prime minister Ariel Sharon responds to stimulus and has gained weight despite being in a coma-like state after suffering a stroke almost six years ago, his son Gilad told The New York Times in an interview published on Thursday.“When he is awake, he looks at me and moves fingers when I ask him to,” Gilad Sharon said of his father. “I am sure he hears me,” he added.Gilad Sharon is set to release a biography of his father, entitled, Sharon: The Life of a Leader, in both Hebrew and English on Tuesday.“He lies in bed, looking like the lord of the manor, sleeping tranquilly. Large, strong, self assured. His cheeks are a healthy shade of red. When he’s awake, he looks out with a penetrating stare. He hasn’t lost a single pound; on the contrary, he’s gained some,” Gilad Sharon purports in the biography.