|
|
|
 |
|
Tim Behrens
FMRIB Centre, Oxford University, UK
Wednesday 5 November 2008
16.00
Seminar Room B10 (Basement)
Alexandra House, 17 Queen Square, London, WC1N 3AR
Learning and the ACC
I will talk about a role for the anterior cingulate cortex assigning value to new information. I will show some data from macaque lesion studies, and from human FMRI studies that argue that the ACC is crucial for weighing new information against old, and for assigning value to potential information. I will argue that that this is true both for information derived from personal experiences of reward and for information derived vicariously from interactions with other individuals. However, I will argue that there is a functional dissociation between the sulcal and gyral portions of the ACC for these two forms of information. Both ACCs and ACCg code for the value of information in the same computational fashion, but ACCs is more concerned with information derived from personal experience of reward, whereas ACCg is more concerned with information derived from vicarious experiences. I will try to get through all this in about half an hour, which should leave me a bit of time to talk about a few things to do with prediction errors and reinforcement learning that I would like to hear your opinions about.