Fig. 3

Location and directional tuning of dorsally located neurons receiving utricular input. (A) Coronal projection of reconstructions of 46 dorsal neurons (>20 μm dorsal to Mauthner cell) that receive direct utricular afferent input, colorized by their inferred directional tuning [see color code, (D)]. In addition, the left and right Mauthner cells are shown in gray to facilitate comparisons with other results. Inset, two example neurons with the locations of their synaptic inputs (arrow, small circles). The processes extending to the left of the reconstruction are presumed axons. (B) Sagittal view of the same neuron reconstructions as in (A). Dashed line indicates the plane separating dorsal neurons from ventral neurons in Figure 4. (C) Horizontal view of the same neurons as in (A). Scale bar applies to (A–C). (D) Summary of the inferred directional tuning of dorsal neurons with utricular input. Vector direction indicates the computed directional tuning of each neuron. Arrow lengths have been adjusted to facilitate visualization.