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Direction-selective motion discrimination by traveling waves in visual cortex

Fig 4

Effect of a moving grating stimulus on endogenous traveling waves.

Here J(x, t) is the stimulus and U_e(x, t) is the response of the medium. In all cases the medium is tuned (δ = 0.02) for leftward propagating waves with a spatial frequency of f_x = 2.5 cycles/mm and a temporal frequency of f_t = −15 Hz. A: Case of a leftwards-moving grating whose spatiotemporal signature matches that of the endogenous waves. B: Case of a rightwards-moving grating (f_t = +15 Hz). C: Case of a stationary grating (f_t = 0 Hz).

doi: https://doi.org/10.1371/journal.pcbi.1008164.g004