Fig. 1. Units in motor cortex display complex activity during reaching.

a Illustration of task. b Straight and curved reaches performed by monkey J (left) and N (right). c Spiking activity and PSTH for unit 61, M1-N, for five example conditions. Lines, mean firing rates; shaded area, SEM. In PSTHs, tall vertical line indicates movement onset, and scale bars indicate 250 ms and 40 spikes/s, respectively. d PSTHs for example motor cortex units, where each trace is a single condition (all conditions plotted). In (b–d), colors assigned according to target angle.