The Functions of Dopamine in Operant Conditioned Reflexes
| Autor: | V. I. Maiorov |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
Punishment (psychology) General Neuroscience 03 medical and health sciences 030104 developmental biology 0302 clinical medicine Dopamine Incentive salience Synaptic plasticity Motor system Reflex medicine Operant conditioning Reinforcement Psychology Neuroscience psychological phenomena and processes 030217 neurology & neurosurgery medicine.drug |
| Zdroj: | Neuroscience and Behavioral Physiology. 49:887-893 |
| ISSN: | 1573-899X 0097-0549 |
| DOI: | 10.1007/s11055-019-00815-y |
| Popis: | Dopamine neurons are activated by stimuli of both positive and negative modality according to the magnitude of the “willing effort” required to produce encouragement or avoidance of punishment. Acquisition of an operant conditioned reflex starts when the target of the movement (an external target, e.g., a lever, a location within a maze, or an internal target, e.g., a posture), based on the Pavlovian association mechanism (possibly dopamine-independent), becomes attractive or repulsive and acquires “incentive salience attribution”, the motive force of which is the “dopamine drive.” From the very beginning of execution of the operant conditioned reflex, dopamine is secreted in the window between activation of the conditioned signal and the movement, where it combines “activation of the central motor system of behavior” [Konorski, 1970] and modulation of synaptic plasticity for further learning. The operant movement performed by the animal under the influence of the dopamine drive is reinforced by diminution of the drive. |
| Databáze: | OpenAIRE |
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