If your summer so far has been filled with physical activity, interspersed with live music and festive parties, Saturday's Aspen Brain Lab may provide a great change of pace. The Aspen Brain Lab will take place at the Doerr-Hosier center at the Aspen Institute, and will include two sessions - Session I runs from 8:30am-12:30pm; Session II is from 2:00-5:30pm. Fifteen thought leaders in the world of neurology and neuro science will present talks in a wide range of topics, from recovering from stroke, sex in the brain and cognitive development at 65 and older. And just to sweeten the pot, the Brain Lab is billed as "The only conference where neurology lectures and laughter meditation sessions live in perfect harmony." Tickets and passes are being sold via www.aspenshowtix.com.