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- W4387568649 abstract "How does the motor cortex combine simple movements (such as single finger flexion/extension) into complex movements (such hand gestures or playing piano)? Motor cortical activity was recorded using intracortical multi-electrode arrays in two people with tetraplegia as they attempted single, pairwise and higher order finger movements. Neural activity for simultaneous movements was largely aligned with linear summation of corresponding single finger movement activities, with two violations. First, the neural activity was normalized, preventing a large magnitude with an increasing number of moving fingers. Second, the neural tuning direction of weakly represented fingers (e.g. middle) changed significantly as a result of the movement of other fingers. These deviations from linearity resulted in non-linear methods outperforming linear methods for neural decoding. Overall, simultaneous finger movements are thus represented by the combination of individual finger movements by pseudo-linear summation." @default.
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- W4387568649 date "2023-10-12" @default.
- W4387568649 modified "2023-10-13" @default.
- W4387568649 title "Pseudo-linear Summation explains Neural Geometry of Multi-finger Movements in Human Premotor Cortex" @default.
- W4387568649 doi "https://doi.org/10.1101/2023.10.11.561982" @default.
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