[Reactions of the directionally sensitive optical interneurons of insects to movement of a two-dimensional pattern].
The reactions to movements of two-dimensional patterns with the same average spatial period were compared in electrophysiological experiments. Directionally-sensitive neurons in connectives of dragonflies (fam. Libellulidae) were 1.5--2 times more sensitive to movement of "dissected" patterns (checkerboards, lattice of circles, stochastic pattern) than to vertical stripes. The power of optic signal in high-frequency domain in dissected patterns is 1.4--1.8 times higher, than in a striped pattern. It is assumed that high-frequency spatial filtering in dragonflies is provided by strong lateral inhibition in retinotopic projection. Dissected and striped patterns elicited identical reactions in directionally-sensitive neurons of the dronefly Eristalis tenax; the same was stated for the locomotory optokinetic reaction of the earty-boring dung beetle Geotrupes stercorosus.
D000818:Animals; D004594:Electrophysiology; D005556:Form Perception / Q000502:physiology*; D005724:Ganglia / Q000166:cytology*; D007313:Insecta / Q000502:physiology*; D007395:Interneurons / Q000502:physiology; D009039:Motion Perception / Q000502:physiology*; D013045:Species Specificity
Reaktsiia direktsionno-chuvstvitel'nykh opticheskikh interneĭronov nasekomykh na dvizhenie dvumernykh uzorov.