Figure 27. Comparison of LNO neurons, which provide input to columnar neurons.

(A) Stacked bar graph illustrating the fraction of inputs and outputs of LNO to partners grouped into supertypes and separated by brain region. Inputs and outputs are normalized per neuron type and brain region. The connectivity strength for inputs and outputs is measured by relative weight and output contribution, respectively. (B) Morphological rendering of LNO neurons. (Bi) GLNO, (Bii) LNO1, and (Biii) LCNOp. Note that LCNOp crosses the midline and arborizes in the contralateral noduli (NO). Additional morphological renderings. LCNOpm, LNO2, LN03, LNa. (C) Illustration of how similarity between LNO neuron types relates to their connectivity to columnar NO neurons. Left: dendrogram depicting the similarity between GLNO, LNO, and LCNO neuron types based on their inputs outside of the NO (i.e., excluding feedback connections from PFN or PEN neurons). The branch height in the dendrogram indicates the normalized distance between types within the similarity space. Right: connectivity from GLNO, LNO, and LCNO neurons onto columnar NO neurons, visualized as in the connectivity graph in Figure 25B. Note that LCNOp and LNO3 neurons project to the ipsilateral NO and therefore target the right-side population of certain PFN types. PFN types that receive inputs from ipsi- and contralateral LNO and LCNO types are highlighted with dashed boxes.

Figure 27—figure supplement 1. Comparison of LNO inputs and outputs.

(A) Similarity matrices (see Materials and methods) for LNO neurons based on their inputs outside of the noduli (NO) (Ai) and within the NO (Aii). (B) Connectivity matrix showing all inputs (including those in the NO) to GLNO, LNO, and LCNO neurons. The matrix columns and row were rearranged based on clustering GLNO, LNO, and LCNO neurons on the basis of their inputs and the input types based on their outputs to GLNO, LNO, and LCNO neurons.

Figure 27—figure supplement 2. Connectivity graph of paths from putative directionally tuned wind sensitive neurons (putative WPN neuron and WLL neuron) to any of the LNO neurons.

Only pathways with a minimal total weight of 1E-05 and a maximum length of 3 were considered. Given these criteria, we only found pathways to GLNO and LNOa. The pathway to GLNO goes through the EB via ER1_b.