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. Author manuscript; available in PMC: 2010 Jan 31.
Published in final edited form as: Neural Comput. 2008 Oct;20(10):2379. doi: 10.1162/neco.2008.12-06-416

Figure 1.

Figure 1

Although responses of some goldfish medulla area I neurons display little or no hysteresis (A), other neurons are clearly hysteretic (B) (Aksay et al., 2003). For the hysteretic responses the firing rates after ON saccades are above those after the OFF saccades. Here and throughout the paper the ON/OFF saccades are defined as abrupt eye movements in the direction of increasing/decreasing firing rate of the neuron. (C) Firing rate as a function of input current for a model neuron. The hysteretic response in the neuron has origins in the non-linearity of NMDA receptor conductance [adopted from (Koulakov et al., 2002)]. The ON response is below the OFF response in contrast to experiments in (B). The discrepancy between (B) and (C) will be explained below in this paper.