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. Author manuscript; available in PMC: 2007 Feb 24.
Published in final edited form as: J Neurophysiol. 2005 May 31;94(3):2150–2161. doi: 10.1152/jn.00411.2005

Figure 1.

Figure 1

Schematics of neuronal circuitry and stimulation configuration. A. The LGMD receives excitatory synaptic inputs (circles shaded in dark grey) on a large dendritic field (A). An important characteristic of this pathway is the presence of a lateral inhibitory network between excitatory afferent fibers presynaptic to the LGMD (inhibitory synapses are illustrated by circles shaded in light grey). ON and OFF feed forward inhibition impinges on two separate dendritic fields (B and C, respectively). B. Looming stimuli consisted of black squares on a bright background approaching at a constant speed v with half-size l. The angle subtended by the object at the retina is denoted by θ.