Other trials, including one of children with brain cancer, are now being carried out across the UK to see whether the drug could be more effective if given in different doses to treat different cancers.

BBC: 'Double whammy' cancer drug hailed

One of the first children Nares helped was a 1-year-old boy with a brain tumor who required frequent chemotherapy treatments.

CNN: Grieving dad helps kids get to chemo

And the brain's executive will keep us in that mode until we hear, say, one of our children screaming.

NPR: Think You're Multitasking? Think Again

But an Italian study, published in the March issue of Nature Neuroscience, found that children prone to a particular type of epilepsy nearly all had problems in one particular area of the brain.

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