Implants that stimulate the body's longest cranial nerve are already treating epilepsy, depression and rheumatoid arthritis. Scientists are now testing whether they can also combat cancer-related wasting, obesity and PTSD. Meanwhile, can an ice bath or an ear massage do the trick? When Kevin Tracey was five years old and his mother was 29, she was diagnosed with brain cancer. His memory of the last time he saw her is poignant. He was riding with his two younger brothers in the back seat of the family car as they accompanied th... [23029 chars]
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