| | From Heather Watkins, your About Health Editor Just how much do you really know about how your brain works, anyway? If, like me, you're not a brain surgeon, you probably take it for granted. But delving into the mysteries of the mind offers a fascinating look at just what makes us so uniquely human. | | Your Musical Mind Picture it: You're driving to work, and all of a sudden, your favorite song from high school comes on the radio. You're flooded with memories and feel-good sensations. What is it about music -- essentially just waves of compressed air -- that can make us happy or sad? Why might one person love a song while another considers it an abomination to the music industry? | What Causes Seizures? Right now, electricity is flowing throughout your brain in patterns and rhythms that adjust to things in your environment. Picture it as though a stream of people are making their way throughout a busy city plaza -- it probably looks a bit random, but it's a sign of healthy activity. A seizure happens when part of the brain starts firing abnormally, akin to a person suddenly starting to yell in the middle of that crowded plaza. | A Knee-Jerk Reaction You've undoubtedly had your patellar reflex checked -- you know, when the doctor taps your knee with a little hammer and your leg jerks out uncontrollably. As a kid, I always thought that was such a cool trick. Your body undergoes so many reflexes throughout the day to keep you alive and well, all without any conscious input from you. | Feeling Numb Numbness and tingling are among the most common reasons why people visit a neurologist. Your nerves can be very sensitive to toxins, nutritional deficiencies, and certain infections. People with diabetes should be especially aware of a set of conditions known as diabetic neuropathy. | | | | Health Ads | | | | Featured Articles | | | | | | Sign up for more free newsletters on your favorite topics | | | | You are receiving this newsletter because you subscribed to the About Health newsletter. If you wish to change your email address or unsubscribe, please click here. About respects your privacy: Our Privacy Policy Contact Information: 249 West 17th Street New York, NY, 10011 © 2012 About.com | | | | Follow us on: | | Advertisement | |