Sensory Neurophysiology: Motion Vision during Motor Action Kit D. Longden, Holger G. Krapp  Current Biology  Volume 21, Issue 17, Pages R650-R652 (September 2011) DOI: 10.1016/j.cub.2011.07.016 Copyright © 2011 Elsevier Ltd Terms and Conditions

Figure 1 The velocity tuning of the Reichardt detector model [19]. (A) Diagram of the Reichardt model used by Jung et al. [8]. The model has high pass (HP), low pass (LP), multiplication (×), and subtraction stages (–). (B) An increase in the time constant of the high pass filter, τHP, increases the response of the model to low velocities. The Reichardt model is tuned to the temporal frequency of the stimulus, so the velocity is shown as temporal frequency. All curves are plotted using the equations and parameters of Jung et al. [8], normalised to the non-flight responses in black [8]: τHP = 170 ms, τLP = 69 ms. Red: τHP = 290 ms; grey: τHP = 100. (C) An increase in the time constant of the low pass filter, τLP, increases the response of the model to high velocities. Black: non-flight responses as in (B): τHP = 170 ms, τLP = 69 ms. Red: τLP = 30 ms; grey: τLP = 140 ms. Current Biology 2011 21, R650-R652DOI: (10.1016/j.cub.2011.07.016) Copyright © 2011 Elsevier Ltd Terms and Conditions