[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2009/images/01/20/art.teddy0120.gi.jpg caption="Sen. Kennedy chatted with the vice president during the swearing in ceremony Tuesday; Sen. Kennedy suffered a seizure later at a luncheon on Capitol Hill."]
(CNN) - Sen. Ted Kennedy's seizure Tuesday was brought on by "simple fatigue," Dr. Edward Aulisi of the Washington Hospital Center said in a statement.
“Senator Edward Kennedy experienced a seizure today while attending a luncheon for President Barack Obama in the U.S. Capitol," Aulisi siad. "After testing, we believe the incident was brought on by simple fatigue. Senator Kennedy is awake, talking with family and friends, and feeling well. He will remain at the Washington Hospital Center overnight for observation, and will be released in the morning."