Bo Diddley suffered a stroke.

Rock Pioneer Bo Diddley Sidelined by Stroke

The Originator is on bed rest.

Pioneering rock-and-roller Bo Diddley suffered a stroke Sunday and is currently in intensive care at Creighton University Medical Center in Omaha, Nebraska, according to a publicist for his management team.

Tests showed that the stroke affected the left side of the "Who Do You Love" singer's brain and has impaired his speech and speech recognition, rep Susan Clary said. She had no other information regarding his condition, which is listed as "guarded," or how long his stay in the hospital is likely to be.

The 78-year-old Diddley, who has a history of hypertension and diabetes, was said to be acting disoriented during a concert in Council Bluffs, Iowa, earlier in the day.

Despite being known as one of the great musical minds who helped put the rhythm in rhythm 'n blues, Diddley's star was eclipsed over the years by artists such as Elvis Presley and the Rolling Stones, who borrowed from Diddley's signature beats.