It starts with the touch as being a set of "pixels" that go around the skin and the value for each pixel is the instant pressure on the skin. So here is like what the touch stimuli look like:
Figure 1: The upper panel is the actual touch stimulus. Here there are just 10 pixels that go around the circumference of the body. We are going to transform this touch stimulus to a train of P cell spikes by both incorporating the receptive field and a temporal filter. In the second panel is the touch stimulus convolved with the P cell temporal filter. This is just a very stupid filter right now that is supposed to fit the P cell a little, but is nowhere near accurate. The final panel is the actual currents that will be injected into each P cell (note that there are 4 rows for each P cell).
Figure 2: Here the P cells are just single compartment IF neurons, and this is there responses to the touch stimulus shown in Figure 1.. The first panel is the voltages, with threshold of -58 mV and Reset of -62. The second panel is the actual spike times of the 4 P cells, and the final panel is the ISI for all 4 P cells.
Figure 3: This is the P cell temporal filter.
No comments:
Post a Comment