Stability of the compass in two-dimensional scenesLooking across all experiments, we observed that heading representations exhibit a varying degree of stability across different scenes (Fig. 5a, b). We wondered whether structure in the vertical dimension—typical for natural scenes and known to be encoded by visual ring neurons13,14,39—could resolve potential ambiguities in scenes with repeating visual features in the horizontal dimension (for example, the ‘same-elevation’ scene in Fig. 5a). Using artificial stimuli, we found that the bump reliably tracked the orientation of an artificial scene with four identical objects placed at different elevations, whereas it could not stably track when these objects were placed at the same elevation (Fig. 5c). This stability is well-predicted by the fact that the two-dimensional autocorrelation of each scene is distinctly single-peaked (Fig. 5d, e). We conclude that the two-dimensional organization of a scene13,14,39 contributes to the generation and stability of the pinning offset.Some insects are capable of snapshot-based navigation30,31,40,41 in which stored visual scenes are recalled to drive scene-specific directional actions. Further analysis of our model indicated that multiple visual maps can be stored simultaneously if plasticity between visual ring neurons and compass neurons is presynaptically gated and the network has access to a rich ring-neuron representation of visual scenes15,35 (Extended Data Figs. 5, 6, Supplementary Information). Other spatially informative sensory inputs—including spectral42, mechanical (for example, wind43) and olfactory cues44—may also contribute to differentiating natural sensory environments.
在二維場景指南針的穩定性<br>縱觀所有的實驗中,我們觀察到的標題表示表現出在不同的場景(圖5A,B)穩定性的不同程度。我們想知道是否結構在垂直維度-典型自然場景和已知由視覺環來編碼neurons13,14,39-能夠解決在場景潛在歧義與在水平維度上重複的視覺特徵(例如,'同一海拔在圖5a'場景)。採用人工刺激,我們發現,該凸塊可靠地追踪的人工場景的取向放置在不同的高度四個相同的對象,而它不能穩定地跟踪時這些對象被放置在相同的高度(圖5c)。的事實,每個場景的二維自相關是明顯的單峰(圖5d,e),本穩定性是良好的預測。我們的結論是一個scene13,14,39有助於產生和牽制的穩定性的二維組織偏移。<br>有些昆蟲能夠在其中存儲的視覺場景召回推動特定場景定向行動基於快照的navigation30,31,40,41的。我們的模型的進一步分析表明,多個視覺圖可以同時存儲如果視覺環的神經元和神經元羅盤之間可塑性門控突觸前和網絡訪問視覺scenes15,35的富環神經元表示(擴展數據圖5,圖6,補充資料)。其它空間信息感覺輸入 - 包括spectral42,機械(例如,wind43)和嗅覺cues44-還可有助於區分自然感覺的環境。
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