p076fig02.26 The mudpuppy retina exhibits the shift property that occurs in the feedforward shunting on-center off-surround network in Figure 2.25.  As a result, its sensitivity also shifts in response to different background off-surrounds, and therefore exhibits no compression (dashed purple lines).<BR>||  Mudpuppy retina neurophysiology.<BR>I center, J background<BR>a) Relative figure-to-ground<BR>b) Weber-Fechner I*(A + J)^(-I)<BR>c) No hyperpolarization, SHUNT: Silent inhibition<BR>d) Shift property(Werblin 1970)  xi(K,J) vs K = ln(I)<BR>Adaptation- sensitivity shifts for different backgrounds. NO COMPRESSION.