The Larry Summers flap produced an outpouring of work on the neurological differences between men and women.

It is therefore unlikely that signing causes the neurological differences in visual attention.

By most reckoning, the study of neurological differences arising from sensory deprivation at birth is a difficult one.

And scientists have uncovered neurological and biological differences that may lie at the core of the coping mechanisms.

"This is the first study to show these kinds of neurological differences in people who have near-death experiences," Ms. Britton said.

There has been limited research on actual neurological differences among ethnic groups.

Minor neurological differences with regard to hemispheric processing exist between brains of males and females.

Studies have also shown neurological differences, but whether this signifies an effect rather than a cause is unknown.

Whatever is left is assumed to underpin the neurological differences between the conditions.