Earlier this year, Sean Lanthier was on a bike ride in the Arastradero Preserve when he took a bad spill — flying over handlebars of his mountain bike, and smacking his head so hard that his helmet cracked. Lanthier's shoulder was tweaked, he'd suffered some scrapes and was a bit dazed, but he felt fine otherwise. He dusted himself off, got back in the saddle and rode home. It wasn't until a couple of weeks later that Lanthier — who had spent 31 years as a firefighter with the city of Palo Alto and now works in the emergency room of El Camino Hospital — began to suspect he had suffered another injury.
Read the article on the Mountain View Voice Online