Dario Franchitti discusses concussion

Four-time IndyCar champion Dario Franchitti has said that a concussion he sustained in 2000 changed his personality.

The Scot retired in 2013 after a heavy accident in Houston left him with two broken vertebrae and a concussion, but it said a prior injury sustained 13 years beforehand caused some big changes.

"The first time I had a big concussion in 2000 my personality, I felt, completely changed afterwards," he told the BBC. "Years later I brought this up with my brother. I said to Marino [fellow racing driver], I think this happened but he said he hadn't noticed."

"But from the inside it felt different. I just think I was a lot more serious not as easy going [after the crash]."

Since retiring, Franchitti has moved back to Scotland, where he lives with new wife Eleanor Robb and their daughter Sofia.

He still works as an advisor for Chip Ganassi Racing, and makes regular trips to America to work with the team. He also commentates on Formula E for the world feed of the all-electric racing series, and carried out development work on Honda's latest NSX supercar.