Effects of fixational eye movements on retinal ganglion cell responses: a modelling study

Supplementary Material - Movies

Figure S1.
The two movies show the spatiotemporal activity of a grid of simulated PC- and MC-cells (diameter 110') during stimulation with the star shaped stimulus (450 ms stimulus duration). The relative stimulus position is shown at the top of each frame (blue: horizontal displacement, green: vertical displacement). Below, the membrane potential of the ganglion cells is color coded for each neuron. The movies illustrate the main findings of the model study: (1) A substantial axial fading occurs in MC-cells and, much weaker, in PC-cells. It is continuously visible in various direction, which are directly related to the motion of the stimulus on the retina. (2) Line-splitting, as described in this work, can be seen in MC-cell responses, but not in PC-cells.



Figure S2.
These movies show the data of Figure S1 after rectification of the membrane potential to simulate the spiking output of the ganglion cells. Rectification was achieved by calculating the spike rate R(t) at each time step by the function R(t)=10*(Vm+2mV)^1.4, where Vm is the membrane potential of the neuron.