Home > Newsletters > Daily: Love or hate Earth Hour? > Daily Dose: This is why your vanilla or cinnamon flavoured e-cigarette is toxic > Health-in-Motion 25 April 2017 Devices like the GPS built into your smartphone or car have revolutionised the way we travel Devices like the GPS built into your smartphone or car have revolutionised the way we travel. Researchers have discovered that these gadgets do such a good job, parts of our brains switch off when we use them. When they asked volunteers to manually navigate through a simulation of central London, brain scans regularly registered spikes of activity in the hippocampus and prefrontal cortex, regions of the brain involved in memory, navigation, planning and decision-making. When simply following GPS instructions, there was no such additional activity. 0 More: Daily Dose: This is why your vanilla or cinnamon flavoured e-cigarette is toxicHealth-in-Motion advertisement Other news Fitness Build a stronger body with one super-move and one weight News Vitamin D no cure for brain diseases Parenting Do gluten-free kids' foods provide enough nutrition? Diet and nutrition To what extent are your genes responsible for your weight? Medical How secondhand smoke boosts sinusitis risk News Obesity adds to burden of traumatic brain injury From our sponsors Tell-tale signs you need a mattress upgrade Keen to win a R2 000 voucher? Good health begins in your gastrointestinal tract ACC 200 works fast to break down mucus Live healthier Smoking and weight gain » Don't think that you're off the hook if you smoke cigars 10 smoking myths people still believe Quitting smoking? Even a little exercise can help you stay slim Best results in limiting weight gain after quitting smoking were found in women who engaged in 150 minutes of moderate intensity activity per week. Baby talk » Why Khloé Kardashian can't breastfeed her baby Baby making Real talk: Is there a ‘right’ age to have a baby? PS Can my mom stop talking about my biological clock already?