And many of the nutrients associated with brain function are known to affect transmission at the synapses.

ECONOMIST: Eat your way to a better brain

Research shows that eating approximately 3 servings per day of vegetables is associated with 40% less mental function decline.

CNN: How does nutrition affect dementia?

Fish consumption is associated with significantly less decline of mental function and lower risk of Alzheimer's disease.

CNN: How does nutrition affect dementia?

Some antidepressants have been shown to be effective in treating mood disorders associated with dementia, but they do not improve cognitive function.

CNN: Better understanding of dementia leading to more effective therapies

The decrease is primarily attributable to the continuing effects of actions taken in conjunction with Clearwire's cost cutting initiatives in 2011 including lower employee-related expenses resulting from headcount reductions and outsourcing of the customer care function, reduced marketing spend, as well as decreased selling commission expense associated with our no-contract product offering which was launched at the beginning of 2012.

ENGADGET: Clearwire sees wholesale revenues dip, LTE delays as it posts a $41.3 million net loss in Q3

Dr Mrazek told BBC News Online that it was possible that the stress associated with parental problems caused chemical changes in the body that had an effect on the function of genes thought to be linked to the development of asthma.

BBC: Parenting link to asthma