Changing-size channels tuned to the oscillation frequency are excited by a stimulus square whose size oscillates at a fixed frequency. In the 0.25–16 Hz frequency band there are at least three kinds of changing-size channels tuned to different frequencies.
© 1980 Optical Society of America
K. I. Beverley and D. Regan, "Temporal selectivity of changing-size channels," J. Opt. Soc. Am. 70, 1375-1377 (1980)