Fig. 7. Ocellar circuits and their integration with VPNs.

a, Overview of the three ocelli (left (L), medial (M) and right(R)) positioned on the top of the head. Photoreceptors from each ocellus project to a specific subregion of the ocellar ganglion which are separated by glia (marked with black lines on the electron micrograph (bottom)). Left and right are flipped in accordance with the orientation of the dataset (Methods). b, Renderings of the axons of the photoreceptors (left) and their counts (bottom right). Top right, location of the ocellar ganglion relative to the brain. c, Renderings of OCG01, OCG02 and DNp28 neurons with arbors. ‘Information flow’ from presynapses and postsynapses is indicated by arrows along the arbors. d, Connectivity matrix of connections between photoreceptors and ocellar projection neurons, including two descending neurons (DNp28). e, Comparison of number of glutamatergic and cholinergic synapses from ocellar projection neurons from the lateral eyes onto downstream neurons coloured by superclass (R = 0.78, P < 10⁻²⁶). f, Summary of the observed connectivity between ocellar projection neurons, VPNs and descending neurons. Scale bars, 100 µm.