Memory-like effects in fly vision: Spatio-temporal interactions in a wide-field neuron

Mastebroek, H. A. K.; Zaagman, W. H.; Lenting, B. P. M.

doi:10.1007/bf00336976

Cited by 8 publications

(2 citation statements)

References 16 publications

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“…To optimize the performance of the DS motion detecting system, the filter time constant of the individual elementary movement detectors adapts to stimulus velocity (Mastebroek et al 1982 (Rind 1990a,b). For the wide-field ND cells studied here, also no changes were observed in the decay of the motion responses.…”

Section: Influence Of Stimulus Velocitymentioning

confidence: 99%

“…A type-2 stimulus was, for instance, stepping sequentially 10 times during 1 s with an interstep-time of 100 ms between the subsequent steps through the visual field. Between the individual type-1 and type-2 stimulus sequences a timeout period of at least 4 s was taken into account to avoid unwanted memory-like effects (Mastebroek et al 1982).…”

Section: Introductionmentioning

confidence: 99%

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Response characteristics of wide-field non-habituating non-directional motion detecting neurons in the optic lobe of the locust, Locusta migratoria

Bult

Mastebroek

1994

J Comp Physiol A

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1.Extracellular recordings from wide-field nonhabituating non-directional (ND) motion detecting neurons in the second optic chiasma of the locust Locusta migratoria are presented. The responses to various types of stepwise moving spot and bar stimuli were monitored (Fig. 1).2. Stepwise motion in all directions elicited bursts of spikes. The response is inhibited at stimulus velocities above 5~ At velocities above 10~ the ND neurons are slightly more sensitive to motion in the horizontal direction than to motion in the vertical direction (Fig. 2). The ND cells have a preference for small moving stimuli (Fig. 3).3. The motion response has two peaks. The latency of the second peak depends on stimulus size and stimulus velocity. Increasing the height from 0.1 to 23.5 ~ of a 5~ moving bar results in a lowering of this latency time from 176 to 130 ms (Fig. 4). When the velocity from a single 0.1 ~ spot is increased from 1 to 16~ the latency decreases from 282 to 180 ms (Figs. 5-6). A change-of-direction sensitivity is displayed.Stepwise motion in one particular direction produces a continuous burst of spike discharges. Reversal or change in direction leads to an inhibition of the response (Fig. 7).5. It shows that non-directional motion perception of the wide-field ND cells can simply be explained by combining self-and lateral inhibition. Abbreviations: PSTH, post stimulus time histogram; DS cell, directionally selective motion detecting cell; ND cell, non-directional motion detecting cell; H1, directionally selective motion detecting neuron in the blowfly; LGMD, lobula giant movement detector in the locust; DCMD, descending contralateral movement detector in the locust; R~, intensity response; Rftb, Rbtf, Rup , Rdown , motion response when moving a stimulus from front-to-back, back-tofront, upwards and downwards over the eye; Rml, Rm2, first and second response peak after stimulus motion Correspondence to: H.A.K. Mastebroek

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Section: Influence Of Stimulus Velocitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%