It is still a mystery to many, yet what we know about the human brain is astonishing in its complexity and unique power. We’ve always strived to learn more, and this weekend, many leaders in neurosciences are in Santa Rosa to answer questions and offer advice on making your brain work for you. The second annual Successful Brain Fair is an interactive and inspiring day that will look into topics ranging from optimum diets and exercises that can improve your thinking, to discussion on understanding and curing post traumatic stress disorder. Vendors from around the area will also be on hand to showcase their work in brain-related activities like music therapy and therapeutic environmental designs. The Successful Brain Fair is Saturday, Oct. 4, at the Veterans Memorial Building, 1351 Maple Ave, Santa Rosa. 10am. $5-$10.