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• W4317715425 abstract "Primary motor cortex (M1) exhibits a protracted period of development that includes the establishment of a somatosensory map long before motor outflow emerges. In rats, the sensory representation is established by postnatal day (P) 8 when cortical activity is still discontinuous. Here, we ask how the representation survives the sudden transition to noisy continuous activity at P12. Using neural decoding to predict forelimb movements based solely on M1 activity, we show that a linear decoder is sufficient to predict limb movements at P8, but not at P12; in contrast, a nonlinear decoder effectively predicts limb movements at P12. The change in decoder performance at P12 reflects an increase in both the complexity and uniqueness of kinematic information available in M1. We next show that the representation at P12 is more susceptible to the deleterious effects of lesioning inputs and to transplanting M1's encoding scheme from one pup to another. We conclude that the emergence of continuous cortical activity signals the developmental onset in M1 of more complex, informationally sparse, and individualized sensory representations." @default.
• W4317715425 created "2023-01-23" @default.
• W4317715425 creator A5006888183 @default.
• W4317715425 creator A5078024860 @default.
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• W4317715425 date "2023-01-22" @default.
• W4317715425 modified "2023-09-28" @default.
• W4317715425 title "Cortical Representation of Movement Across the Developmental Transition to Continuous Neural Activity" @default.
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• W4317715425 doi "https://doi.org/10.1101/2023.01.22.525085" @default.
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