Neural Population Dynamics during Reaching Are Better Explained by a Dynamical System than Representational Tuning
Fig 4
Tuning properties of RNN neurons.
(a) Three example units for which the pattern of directional tuning remained highly correlated between the delay period and movement. (b) Same as a, but for example units that have delay tuning that is not correlated with movement activity. (c) Same as a, but for example units that invert their tuning between delay and movement. (d) Preferred reach direction (highest firing) of all 200 units, sorted by preferred direction at go cue. If there was no firing rate difference (< 1e-4) between the preferred direction and non-preferred direction, units were deemed un-tuned and are marked in white. Firing rates are displayed from 0 to the maximum firing rate of each neuron.