03-02 Memory1-1 - Memory I Everything in life is memory,...

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1 Memory I “Everything in life is memory , save for the thin edge of the present - Gazzaniga, 2000 Schedules of Reinforcement • Intermittent (partial) reinforcement is more effective in maintaining a behavior than continuous reinforcement (reinforcing every response) Green = intermittent reinforcement Red = continuous reinforcement Learning: Neural Mechanisms Neural Bases of Reward • Cellular Mechanisms of Learning
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2 Neural Basis of Reward Key Brain Structures Ventral Tegmental Area (VTA) Medial Forebrain Bundle (MFB) Nucleus Accumbens Major Neurotransmitter Dopamine Intracranial Self-Stimulation • Much of what is known about “reward centers” has come from electrical stimulation studies in rats • Implanted electrode in the VTA of rats Intracranial Self-Stimulation • Rat in Skinner box • Depressing the lever in the Skinner box stimulated the electrode in the VTA Rats press lever endlessly!
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3 Learning: Neural Mechanisms Neural Bases of Reward • Cellular Mechanisms of Learning Long-Term Potentiation Neuron A Neuron B Long-Term Potentiation (LTP) LTP b the long-lasting strengthening of the connection between two nerve cells – When neuron A repeatedly and rapidly stimulates neuron B, neuron B becomes more sensitive to stimulation from neuron A Long-Term Potentiation
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This note was uploaded on 02/05/2011 for the course PSYCH 1101 taught by Professor Tomhutcheon during the Spring '10 term at Georgia Institute of Technology.

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03-02 Memory1-1 - Memory I Everything in life is memory,...

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