WASHINGTON, July 30 — Chief Justice John G. Roberts Jr. was hospitalized on today after suffering a seizure at his summer home in Maine, the Supreme Court announced.
The episode, described as a “benign idiopathic seizure,” was similar to one he suffered 14 years ago, according to the court’s press release. Idiopathic means that the cause of the seizure remains unknown.
He had no lasting effects from the earlier incident and was “fully recovered” from the seizure he suffered about 2 p.m. today, the court said, adding that the chief justice had undergone “a thorough neurological evaluation, which revealed no cause for concern.”
He was to remain overnight “as a precaution” at Penobscot Bay Medical Center in Rockport.
The seizure caused a fall, in which he “experienced minor scrapes,” the court said.
Chief Justice John G. Roberts, 2005.
Chief Justice John Roberts was hospitalized after having a seizure in his summer home in Maine. A statement released by Supreme Court spokeswoman Kathy Arberg stated that Justice Roberts took a minor fall from the seizure, and has been transported to the Penobscot Bay Medical Center. In addition, she said that Justice Roberts has undergone a, "thorough neurological evaluation, which revealed no cause for concern." 

Justice Roberts, 52, had a similar incident in 1993, when he suffered a "isolated, idiosyncratic seizure," according to White House doctors. 

The Justice was returning from a boat ride at around 2 p.m. EDT (UTC-4) Monday when he fell on a dock near his home in Port Clyde on Maine's Hupper Island, Arberg said. He was taken by boat to the mainland, and transferred to an ambulance, said St. George Fire Chief Tim Polky. Doctors have determined that this incident was caused by "a benign idiopathic seizure." Both descriptions, according to Arberg, hint that doctors could not determine the cause of the seizures, or link them to any known condition.