Originally thought to have suffered an on-air stroke, CBS 2 TV reporter Serene Branson actually had a "complex migraine," her doctor said, according to the Los Angeles Times.

Branson was reporting live from the Grammys on Sunday when her speech became unintelligible and she became disoriented. Video of the event immediately went viral, and doctors around the country soon began speculating the cause of her confusion and garbled speech. Many thought she'd suffered a stroke.

But Dr. Neil Martin, Branson's physician and chief of neurosurgery at the Ronald Reagan UCLA Medical Center, said it was a symptom of a "complex migraine." The symptoms for that specific type of migraines are similar to small strokes and commonly misdiagnosed.