DS_Gabor_One   This is among the simplest possible direction selective (DS) models. It consists of a linear filter followed by half-wave rectification and then a Poisson spike generator. The linear filter is a Gabor function in which the sinusoidal grating is tilted in space-time. This model belongs to a class referred to as 1-branch (Emerson, 1997) because it has a single L-N pathway. It provides a basic point of comparison to the output of direction-biased and DS simple cells.