MEO_Gabor   This opponent motion energy (ME) model is perhaps the most idealized model of cortical direction selectivity. It was introduced by Adelson and Bergen (1985) and differs from their physiologically plausible ME model because its linear filters are 3-D Gabor functions (Gaussian times sinusoid). This model belongs to the class known as elaborated Reichardt detectors (van Santen and Sperling, 1984; Adelson and Bergen, 1985; van Santen and Sperling, 1985). Essentially, the model consists of the difference between the outputs (before spike generation) of two ME_Gabor (i.e., non-opponent) models that have opposite preferred directions. Like the ME_Gabor model, it provides an inadequate account of typical DS cells in macaque V1 and V5/MT (e.g., Bair and Movshon, 2004).