PORTLAND, Oregon (Reuter) - Author Ken Kesey was improving but remained in an Oregon hospital after suffering a stroke last week, hospital officials and his relatives said. The author of "One Flew Over the Cuckoo's Nest" and many other books suffered the stroke on Thursday at his home in Pleasant Hill, Oregon, according to his stepfather, Ed Jolley. Jolley said Kesey, 62, felt numbness on his right side after waking up from an afternoon nap. By Monday, Kesey had been moved out of intensive care and was listed in fair condition at Sacred Heart Medical Center in Eugene, Oregon, near his home. "He's got the movement back in his hand," Jolley said. "He still has a problem lifting his arms. But they say that'll come back with therapy." Jolley said Kesey was getting set to be interviewed by producers of a CD-ROM version of "One Flew Over the Cuckoo's Nest," his classic 1962 novel set in a mental institution, when he noticed the numbness, Jolley said. Jolley said Kesey probably would be released from the hospital this week. "It looks like it's going to be OK," he said. "He'll just have to take care of himself more." After winning notoriety upon publication of the savage satire on the authoritarian nature of modern institutions, Kesey became part of "The Merry Pranksters," a group of artists whose exploits were chronicled by Tom Wolfe in the book, "The Electric Kool-Aid Acid Test." Other Kesey novels include "Sometimes a Great Notion," published in 1964, and "Sailor Song," published in 1992.