PFN [FBbt_00003634]

PFN

ID: FBbt_00003634

Small field neuron of the central complex that connects a single glomerulus of the protocerebral bridge with a ventral region of one column of the fan-shaped body and a contralateral nodulus (Hanesch et al., 1989; Lin et al., 2015; Wolff et al., 2020; Hulse et al., 2021). These cells do not target protocerebral bridge glomerulus 1 (Wolff et al., 2015; Hulse et al., 2021). All subtypes follow a similar wiring pattern between protocerebral bridge glomeruli and fan-shaped body columns, with the cell of the most lateral glomerulus (G9) projecting to the ipsilateral lateral FB, and the cell of the most medial glomerulus (G2) projecting to the contralateral lateral FB (Wolff et al., 2015; Hulse et al., 2021). It develops from one of the four central complex neuroblasts (Sullivan et al., 2019).

Lin et al. (2013) and Wolff et al. (2015) state that 'vertical fiber system' terminology of Hanesch et al. (1989) covers all subtypes of protocerebral bridge 1 glomerulus-fan-shaped body-nodulus neuron. Wiring diagram of Hanesch et al. (1989) figure 5 does not fit more recent accounts of any subtypes (Wolff et al., 2015; Hulse et al., 2021).