Fig. 2
From: Cortical population activity within a preserved neural manifold underlies multiple motor behaviors
Tasks and recordings. a The wrist isometric center-out task. Torque trajectories to acquire each target (colored squares) during the 1-D isometric (b) and 2-D isometric (c) tasks. d Exerted wrist torque or movement to acquire each target. e Three neural units illustrate the variety of activity patterns across units, and how these patterns change across tasks. Right inset: overlaid action potential waveform for each unit across tasks; each task in a different color. Note the excellent overlap. Data for b–e are from Monkey J, averaged over all trials in one session, and colored according to target location (b, c; see also Supplementary Fig. 2). f The power grip task. g Grasp force trajectories to acquire each target (black or gray squares). h Three neural units illustrate the variety of activity patterns across units for the grip task, and how these patterns change in a complex manner for the ball task. Right inset: overlaid action potential waveform for each unit across both tasks; each task in a different color. Note the excellent overlap. Data for g and h are from Monkey C, averaged over all trials in one session, and colored according to target (g). i Correlations r between the activity pattern of each neural unit across each pair of tasks, pooled over all units, task comparisons, sessions, and monkeys for the wrist and reach-to-grasp datasets separately; top error bar: correlation mean ± s.d.; for the wrist datasets, \(\bar r\) = 0.15 ± 0.19, n = 1476; for the reach-to-grasp datasets, \(\bar r\) = 0.11 ± 0.13, n = 376
