Research Highlights

Nature 460, 438-439 (23 July 2009) | doi:10.1038/460438f; Published online 22 July 2009

Neuroscience: Knowledge rewards

Neuron 63, 119–126 (2009)

Monkeys like to know the size of rewards coming their way, and, in the brain, this desire is signalled by the same dopamine neurons that signal primitive rewards like sex and food.

Ethan Bromberg-Martin and Okihide Hikosaka of the National Eye Institute in Bethesda, Maryland, trained two monkeys to glance at one of two targets on a computer screen in order to receive a drink reward, which was randomly large or small. When one target included information about reward size the monkeys preferred to go for that target, rather than be surprised by a randomly sized reward.

The scientists recorded from single neurons in the brain's 'reward' circuitry and found that they fired when the monkeys learned information about the future. This suggests that the act of prediction may be intrinsically rewarding.

Readers' Comments

If you find something abusive or inappropriate or which does not otherwise comply with our Terms and Conditions or Community Guidelines, please select the relevant 'Report this comment' link.

There are currently no comments.

Add your own comment

This is a public forum. Please keep to our Community Guidelines. You can be controversial, but please don't get personal or offensive and do keep it brief. Remember our threads are for feedback and discussion - not for publishing papers, press releases or advertisements.

You need to be registered with Nature and agree to our Community Guidelines to leave a comment. Please log in or register as a new user. You will be re-directed back to this page.