Gabor.0.1
2007 Apr 02Summary This is an orientation-tuned spiking unit. It consists of a space-time oriented Gabor filter (shown below with vertical orientation) and a conductance-driven integrate-and-fire spike generator. This simple model captures some of the tuning properties of a sustained-firing macaque V1 simple cell. This model is similar to Gabor.0.0, except that model uses Poisson spike generation instead of integrate-and-fire.
Gabor.0.1.mod
Data
Results
The results here were obtained using this response file, which records spikes from a unit near the center of the stimulus grid.
Sine Tuning
- Direction - at TF 4 Hz, SF 1.2 cyc/deg
- Spatial frequency - at TF 4 Hz
- Temporal frequency - at SF 1.2 cyc/deg
- Static phase
Spike Timing
- ISI - inter-spike interval for a static grating
Discussion
The integrate-and-fire spike generating mechanism used here makes this model more complicated than Gabor.0.0, for example, a refractory period is evident in the ISI distribution. A major limitation is the lack of adaptation to luminance and contrast.