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Zebrafish (Done)

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Disrupting visual experience early on in animal development results in a change in tectal activity. Changes in tectal activity resulted in an inability to successfully hunt and capture prey. Tectal development was demonstrated to be affected by intrinsic factors and visual cues. (Avitan, 2017) https://www.cell.com/current-biology/fulltext/S0960-9822(17)30793-5

The optic tetum is especially important in complex visually guided behaviors in zebrafish.(Gahtan et al., 2005; Nevin et al., 2008; Fero et al., 2011) Hypothalamus inhibitory signaling to the deep tectal neuropil is important in tectal processing in zebrafish larvae (Heap, 2018). https://www.frontiersin.org/articles/10.3389/fnana.2017.00135/full Tectum structures within Zebrafish form early on in development. Within the first three days upon fertilization, Retinal ganglion cell begin appearing and the laminae of the tectal forms along with the periventricular layer. Struermer, 1988) The tectal neuropil contains structures including periventricular neurons axons and dendrites. The neuropil also contains GABAergic superficial inhibitory neurons located in stratum opticum (Del Bene et al., 2010; Robles et al., 2011; Dunn et al., 2016) Fish lack a visual cortex (Lázár, 1973; Streidter and Northcutt, 1989). Instead, they have a much larger tectum that is hypothesized to carry out some of the visual processing that the cortex performs in mammals (Nevin et al., 2010; Orger, 2016)