Figure 2—figure supplement 2.
- ID
- ZDB-FIG-210630-51
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- Dehmelt et al., 2021 - Spherical arena reveals optokinetic response tuning to stimulus location, size, and frequency across entire visual field of larval zebrafish
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(a–d) show 60 s samples of eye position traces obtained during visual stimulation (dark grey traces). Saccades were cropped, as demonstrated in Figure 2—figure supplement 1. Positive angles correspond to more rightward eye positions. Coloured traces show best fit to data (see Materials and methods), along with the resulting OKR gain. Fish were presented with either (a) whole field visual stimuli, or (b–d) smaller disk-shaped stimuli, as in Figure 3. (a) Whole-field stimulation elicits reliable OKR, even though high stimulus frequencies keep its gain below 1. (b) The same is true for disk stimulus in a preferred region of the visual space (stimulus D7, azimuth −90°, elevation +39°, that is lateral and dorsal to the fish), although the smaller stimulus evokes a smaller OKR gain. (c) Disk stimuli presented in a disfavoured part of the visual field (stimulus D3, azimuth −90°, elevation +74°, almost dorsal to the fish) evoke significantly lower gains, but still reliable OKR behaviour. Data in (a,c) correspond to trials shown in Figure 2c. (d) As it is possible to encounter behaviours other than OKR, or in addition to OKR, we inspected all trials before data analysis. Trials in which no pure OKR was present, such as the one shown here, were excluded (stimulus D3, same as in c). |