Abstract
It has been postulated that descending motor commands from the motor cortex and cerebellum are generated by recurrent networks driven by positive feedback. Computer simulation of a reaching task was used to examine this theory. Twelve two-cellt reciprocally connected elements were connected in a loop, and each element was assigned a preferred direction. Cerebellar inhibition levels were set for each element to produce a movement in a desired direction. When a stimulus was given in the desired direction, the population vector grew in the desired direction. When a stimulus was given 90° away from the desired direction, the population vector rotated to the desired direction as seen in data from neuronal recordings in the motor cortex of monkeys during movement. These results demonstrate that networks driven by positive feedback can account for the rotation of the direction vector observed in the motor cortex during reaching
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© 1992 Springer Science+Business Media New York
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Eisenman, L.N., Keifer, J., Houk, J.C. (1992). Positive Feedback in the Cerebro-Cerebellar Recurrent Network May Explain Rotation of Population Vectors. In: Eeckman, F.H. (eds) Analysis and Modeling of Neural Systems. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-4010-6_37
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DOI: https://doi.org/10.1007/978-1-4615-4010-6_37
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