The idea of cognitive enhancement makes people uneasy.

They concluded that 'early indications are that members of society are more likely to agree with cognitive enhancement [of doctors] if motivations for using them are seen to be unselfish'.

So there can be no single transmitter 'for' cognitive enhancement.

So might 'cognitive enhancement' boil down simply to increasing arousal and alertness?

But, she says, 'it would be devastating to learn that a dazzling youth of successful cognitive enhancement meant a middle-age of premature memory loss and cognitive decline'.