- Poster presentation
- Open Access
An actor-critic model of saccade adaptation
© Inaba and Yamazaki; licensee BioMed Central Ltd. 2013
- Published: 8 July 2013
- Basal Ganglion
- Ventral Tegmental Area
- Reinforcement Learning
- Supervise Learning
- Motor Learning
The basal ganglia and the cerebellum are subcortical structures indispensable for voluntary motor control and motor learning. They are thought to perform reinforcement learning and supervised learning, respectively, and interact with each other . Yet, how these structures and their learning mechanisms interact remains unknown.
We adopt the proposed scheme to double-step adaptation of saccade, which is voluntary eye movement and is mediated by a distributed network including both the basal ganglia and the cerebellum. A double-step saccade adaptation paradigm called direction adaptation goes as follows (Figure 1B). Initially, the eye is fixated at the center position. Next, a target appears at a certain position, and the eye moves to the target (first saccade). When the saccade starts, the target is immediately removed and reappears to another position. In turn, the eye moves to the second target (corrective saccade). By repeating many trials, when the first target appears, the eye moves to the position of the expected second target. Our proposed model reproduces this direction-adaptation of saccades. These results suggest that the interaction between the basal ganglia and the cerebellum as an actor-critic model provides a powerful motor control and learning mechanism.
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