TED Health

Stress. It makes your heart pound, your breathing quicken and your forehead sweat. But while stress has been made into a public health enemy, new research suggests that stress may only be bad for you if you believe that to be the case. Psychologist Kelly McGonigal urges us to see stress as a positive, and introduces us to an unsung mechanism for stress reduction: reaching out to others.

Russell Foster is a circadian neuroscientist: He studies the sleep cycles of the brain. And he asks: What do we know about sleep? Not a lot, it turns out, for something we do with one-third of our lives. In this talk, Foster shares three popular theories about why we sleep, busts some myths about how much sleep we need at different ages -- and hints at some bold new uses of sleep as a predictor of mental health.

To all appearances, Eleanor Longden was just like every other student, heading to college full of promise and without a care in the world. That was until the voices in her head started talking. Initially innocuous, these internal narrators became increasingly antagonistic and dictatorial, turning her life into a living nightmare. Diagnosed with schizophrenia, hospitalized, drugged, Longden was discarded by a system that didn't know how to help her. Longden tells the moving tale of her years-long journey back to mental health, and makes the case that it was through learning to listen to her voices that she was able to survive.

During a Formula 1 race, a car sends hundreds of millions of data points to its garage for real-time analysis and feedback. So why not use this detailed and rigorous data system elsewhere, like at children's hospitals? Peter van Manen tells us more.

As a young EMT on a Jerusalem ambulance, Eli Beer realized that, stuck in brutal urban traffic, they often arrived too late to help. So he organized a group of volunteer EMTs -- many on foot -- ready to drop everything and dash to save lives in their neighborhood. Today, United Hatzlah uses a smartphone app and a fleet of "ambucycles" to help nearby patients until an ambulance arrives. With an average response time of 3 minutes, last year, they treated 207,000 people in Israel. And the idea is going global.

Roberto D'Angelo and Francesca Fedeli thought their baby boy Mario was healthy -- until at 10 days old, they discovered he'd had a perinatal stroke. With Mario unable to control the left side of his body, they grappled with tough questions: Would he be "normal?” Could he live a full life? The poignant story of parents facing their fears -- and how they turned them around.

Collecting global health data is an imperfect science: Workers tramp through villages to knock on doors and ask questions, write the answers on paper forms, then input the data -- and from this messy, gappy information, countries and NGOs need to make huge decisions. Data geek Joel Selanikio talks through the sea change in collecting health data in the past decade -- starting with the PalmPilot and Hotmail, and now moving into the cloud.

Thinking about death is frightening, but planning ahead is practical and leaves more room for peace of mind in our final days. In a solemn, thoughtful talk, Judy MacDonald Johnston shares 5 practices for planning for a good end of life.

Nilofer Merchant suggests a small idea that just might have a big impact on your life and health: Next time you have a one-on-one meeting, make it into a "walking meeting" -- and let ideas flow while you walk and talk.

Today, thanks to better early detection, there are 63% fewer deaths from heart disease than there were just a few decades ago. Thomas Insel, the director of the National Institute of Mental Health, wonders: Could we do the same for depression and schizophrenia? The first step in this new avenue of research, he says, is a crucial reframing: for us to stop thinking about "mental disorders" and start understanding them as "brain disorders."

It's 2013, yet 2.5 billion people in the world have no access to a basic sanitary toilet. And when there's no loo, where do you poo? In the street, probably near your water and food sources -- causing untold death and disease from contamination. Get ready for a blunt, funny, powerful talk from journalist Rose George about a once-unmentionable problem.

When Eric Dishman was in college, doctors told him he had 2 to 3 years to live. That was a long time ago. Now, Dishman puts his experience and his expertise as a medical tech specialist together to suggest a bold idea for reinventing health care -- by putting the patient at the center of a treatment team.

Our bodies and homes are covered in microbes -- some good for us, some bad for us. As we learn more about the germs and microbes who share our living spaces, TED Fellow Jessica Green asks: Can we design buildings that encourage happy, healthy microbial environments?

Today we know the molecular cause of 4,000 diseases, but treatments are available for only 250 of them. So what's taking so long? Geneticist and physician Francis Collins explains why systematic drug discovery is imperative, even for rare and complex diseases, and offers a few solutions -- like teaching old drugs new tricks.

Ron Finley plants vegetable gardens in South Central LA -- in abandoned lots, traffic medians, along the curbs. Why? For fun, for defiance, for beauty and to offer some alternative to fast food in a community where "the drive-thrus are killing more people than the drive-bys."