2016华东师范大学学术讲座：A Taxonomy of Neurons for Parallel Processing of Reward and Aversiveness

一、讲座题目

A Taxonomy of Neurons for Parallel Processing of Reward and Aversiveness

二、主讲人

Christopher FiorilloKorea Advanced Institute of Science and Technology

三、时间安排

开始时间：2016-11-23 16:00:00

结束时间：2016-11-23 17:00:00

四、讲座地址

Room 1504, Pudong Campus, 1555 Century Avenue, NYU Shanghai

五、主办单位

NYU-ECNU Institute of Brain and Cognitive Science at NYU Shanghai

六、报告内容：

Decisions are based on predictions of the value of stimuli and actions.  Value has commonly been viewed as a single dimension that varies from bad to good (punishment to reward), in analogy to light intensity varying from dark to light.  I will present evidence that dopamine neurons in primate midbrain signal evidence for reward, but they are entirely insensitive to aversiveness (punishment).  These experiments suggest that ‘reward’ and ‘aversiveness’ are two separate dimensions of value, each represented by two types of reinforcement corresponding to evidence ‘for’ and ‘against.’  I will propose that these four reinforcement signals are summed via G-protein-coupled receptors in one of eight ways, depending on receptor expression, to drive Hebbian learning and shape a neuron’s receptive fields to be one of eight value types.  Reward and aversive information is mixed in early sensory neurons, then segregated into parallel paths, then divided into ‘good’ and ‘bad’ along each dimension.  At the late motor stage, neurons receive evidence for reward or against aversiveness to mediate either approach or avoidance.