Reward and Learning PNS1

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  • Created by: ksjvsba
  • Created on: 17-01-16 14:53
Rescorla Wagner (72)
Estimates the expected reward using an exponentially weighted average of recently received rewards/
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Neuromodulator dopamin and its most prominent target.......... are implicated in motivation and action
the straitum
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What is the basal gangia input?
Projection from entire cortex (inc sensory, motor, associative areas) to striatum... TOPOGRAPHIC
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What are the basal gangia functions?
Motor control (plus range of motor disorders, but also drug abuse, reward, motivation). Particular Ideas; action selection or facilitation and suppression, behavioural switching/monitoring/regulation, sequential movements,limbic, reinforcemen learnin
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Dopamine is involved in...
reward, self stimulation, addiction, motor control, synaptic plasticity
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Dopamine in response to reward as weighted sum of current and past rewards
Looks like current t-weighted average of past rs(t-V)
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Dopamine response to reward as function of prediction error r-V
Quite linear, negative error cut off due to low baseline response
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What should prediction error do?
Drive learning about expected rewards and guide decision making
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Neuromodulator dopamin and its most prominent target.......... are implicated in motivation and action

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the straitum

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What is the basal gangia input?

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What are the basal gangia functions?

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Dopamine is involved in...

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