Fig. 8.
Role of spike-frequency adaptation in selectivity for approaching versus receding stimuli. a Response of model with full spike-frequency adaptation (τCa = 130 ms) to approach by a looming stimulus with l/|ν| = 10 ms. b Response of model with full spike-frequency adaptation to receding stimulus with l/|ν| 10 ms; the response from a is superimposed with grey dotted line after inverting the time axis and aligning the peaks. c Response of model with reduced spike-frequency adaptation (τCa = 20 ms) to approaching (dotted grey line) and receding (black) stimulus with l/|ν| = 10 ms