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. Author manuscript; available in PMC: 2008 Jun 17.
Published in final edited form as: Vision Res. 2005 Oct 18;46(6-7):979–992. doi: 10.1016/j.visres.2005.09.001

Fig. 1.

Fig. 1

The initial horizontal OFRs elicited by two-image movies applied to various vertical gratings: dependence of mean R-L velocity response profiles on an intervening luminance-matched period of gray, the ISI (subject, FAM). A: A sinusoidal grating of wavelength 6.55º, the 1f stimulus. B: A sinusoidal grating of wavelength 2.183º, the 3f stimulus. C: A square-wave grating of wavelength 6.55º with a missing fundamental, the mf stimulus. The phase differences between the two frames of the movies resulted in 1.65º steps corresponding to ¼ of the wavelength of the fundamental of the 1f and mf stimuli and ¾ of the wavelength of the 3f stimulus. Each trace is the mean response to 181–241 repetitions of the stimulus. Note that time on the abscissa starts 40 ms after the appearance of the 2nd image. The numbers on the traces indicate the ISIs in ms. Upward deflections of the traces denote forward eye movements in the direction of the steps, the dotted lines indicating zero eye velocity. Contrast was 32% for the pure sinusoids and for the 3f component of the mf stimulus.