2020
DOI: 10.7554/elife.55217
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Principles of operation of a cerebellar learning circuit

Abstract: We provide behavioral evidence using monkey smooth pursuit eye movements for four principles of cerebellar learning. Using a circuit-level model of the cerebellum, we link behavioral data to learning’s neural implementation. The four principles are: (1) early, fast, acquisition driven by climbing fiber inputs to the cerebellar cortex, with poor retention; (2) learned responses of Purkinje cells guide transfer of learning from the cerebellar cortex to the deep cerebellar nucleus, with excellent retention; (3) f… Show more

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Cited by 29 publications
(44 citation statements)
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“…3 H ). These result are consistent with a recent study using a motor learning paradigm which did not find a correlation between movement speed in the base direction before change in the target direction and learning on the next trial ( Herzfeld et al, 2020 ). Thus, it is unlikely that residual movement on the fixation trials within the fixation window was necessary for learning.…”
Section: Resultssupporting
confidence: 93%
“…3 H ). These result are consistent with a recent study using a motor learning paradigm which did not find a correlation between movement speed in the base direction before change in the target direction and learning on the next trial ( Herzfeld et al, 2020 ). Thus, it is unlikely that residual movement on the fixation trials within the fixation window was necessary for learning.…”
Section: Resultssupporting
confidence: 93%
“…Might it be that interactions between these two areas lead to changes in error sensitivity and reaching biases? While we can only speculate, one possibility might be that prediction errors experienced during passive training cause changes in Purkinje cells (P-cells) in the cerebellar cortex, which rapidly transfer to slower and more robust learning units in the deep cerebellar nucleus (Herzfeld et al, 2020; Lisberger et al, 1994; McCormick & Thompson, 1984; Perret et al, 1993). Thus, interplay between P-cells and the deep nuclei, might be responsible for facilitating the changes in slow state error sensitivity observed early (5 min) after passive training.…”
Section: Discussionmentioning
confidence: 99%
“…Both induce plasticity that affects behavior, but the effects are asymmetric: simple spike rates change more after experience of a complex spike (as compared to when the complex spike is missing), and may also decay more with passage of time. In addition, the conjecture that P-cells act as surrogate teachers for their DCN neurons (Medina and Mauk, 1999) raises the possibility that even slower timescales of adaptation arise from plasticity in the DCN neurons (Herzfeld et al, 2020), though this conjecture also remains to be tested. The asymmetric response of a P-cell to presence or absence of a complex spike may be responsible for the fact that reversal of error during extinction training does not reverse the effects of past learning.…”
Section: Discussionmentioning
confidence: 99%