Microstimulation in a spiking neural network model of the midbrain superior colliculus
Fig 4
Population dynamics in the gaze-motor map and eye kinematics.
(A,D) Spike counts from the gaze-motor map represents the recruited population to microstimulation with lateral interactions. Peak firing rates of the cells decrease with distance from the population center. (B,E) Temporal burst profiles of the recruited neurons (taken at 0.1 mm intervals from the central neuron) portray synchronized population activity, here shown along the rostral-caudal direction in the map. Burst durations increase, but the total number of spikes from the population remains the same. (C,F) Emerging eye displacements and eye velocity profiles, generated by the linear dynamic ensemble-coding model (Eqs 2b and 3). Horizontal (green), vertical (yellow), and vectorial (purple) eye-displacement traces.