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SUMMARY:The Reward Prediction Error of Dopamine Neurons: What information 
 does it convey and how is it generated? - Dr. Christopher D. Fiorillo - De
 partment of Bio and Brain Engineering\, KAIST - Daejeon\, Korea
DTSTART:20140612T150000Z
DTEND:20140612T160000Z
UID:TALK52836@talks.cam.ac.uk
CONTACT:Philipe Mendonca
DESCRIPTION:The firing rate of midbrain dopamine neurons is increased bri
 efly following reward events that are better than expected\, a response t
 hat is aptly described as a “reward prediction error” and which is tho
 ught to teach reward value to the brain. I will present data showing that 
 the firing of dopamine neurons signals only evidence for reward\, and tha
 t they are insensitive to aversiveness. This indicates that reward and ave
 rsiveness are represented independently as two dimensions. We can infer th
 e existence of four types of value-sensitive neurons corresponding to rewa
 rd-ON (dopamine)\, reward-OFF\, aversive-ON\, and aversive-OFF. I will als
 o propose that many if not all sensory-related neurons signal prediction e
 rrors\, and I will describe how error signals are likely to be generated t
 hrough a combination of synaptic inputs and voltage-regulated ion channels
 .
LOCATION:Hodgkin Huxley Seminar Room\, Physiology Building\, Downing Site
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