Fig. 2: Facilitation is generated on unselected trajectories.
From: Preattentive facilitation of target trajectories in a dragonfly visual neuron
We applied frequency-tagging to Primers to determine which was selected on any individual trial. a An example of frequency-tagging with the modulation of one Primer contrast at 15 Hz before a Probe. b Wavelet scalogram of the spike activity (Inverse Interspike Interval) in response to a single example trial reveals a frequency-locked response at 15 Hz. c Time-collapsed wavelet scalogram (b) reveals a peak around 15 Hz. d Box-and-whisker with overlaid swarm plots illustrating Probe response, for Long (800 ms) and Short (400 ms) Primers combined (896 total trials across 15 dragonflies). For comparison, Probe Alone, Local, Distant and Paired Primers are shown (i.e. same data as in Fig. 1). Local Selection and Distant Selection box plots are the Paired Primers (purple) categorised by the Selectivity Index. We observe similar distributions between Local and Distant selection trials. e Frequency Polygons illustrating the distributions of each condition. Local Selection (gold) and Distant Selection (cyan) more closely match Local Primer (red) than the Merged Model (dashed purple) confirming that the Probe target is facilitated with either Local or Distant Selection.
