There were also no significant differences between the groups in relation to their speech, language, behaviour or neurological development.

BBC: Pregnant woman undergoing an ultrasound

It is believed that sleep deprivation may harm neurological development and can contribute to behavioural problems including attention deficit hyperactivity disorder (ADHD).

BBC: Children losing out on sleep

In moderate cases, the pollutants disrupt youngsters' neurological development.

CNN: THE GREAT DIOXIN SCARE

However, it said further research was needed in a number of areas, including the effect of contaminants on neurological health, the effects on the development of children born to women who were pregnant at the time of the incident and the effects on children who were less than a year old in 1988.

BBC: Lowermoor treatment works, Camelford

But when it comes to new drugs in development, atherosclerosis is dwarfed by cancer and neurological disorders.

FORBES: As Companies Abandon Cholesterol, An Old Player Re-Emerges

Older fathers and therefore genetic mutations have been linked with neurological conditions because the brain depends on more genes for its development and regulation.

BBC: Older dads linked to rise in genetic disorder