PSYC 251 Lecture Notes - Lecture 4: Reinforcement Learning, Basal Ganglia, Brainstem
2 Nov 2016
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Document Summary
What is action: change the environment, somatic. Smooth muscles: change blood pressure, digest food. Problem: how to effect change in the world. Importance: necessary to achieve goals (eat, drink, reproduce, survive, etc ) Challenge: the inverse problem: determining what actions to take in order to achieve goals. Current position & desired position: motor commands- used to create motor plans. Current position & motor commands: predicted position- used to evaluate motor plans and/or action. Feedforward control: motor command sent to muscle, faster, but less accurate. Feedback control: motor command sent to muscle, actual stated compared to desired state, adjustments made based on errors, slower, but more accurate. Planning of voluntary actions begins at a conceptual level based on goals, e. g. quench thirst (goal) Drink from cup (conceptual level: pick up cup with right hand (effector level) Activate appropriate muscles in arm (implementation level)
