FIGURE 4.

Social electric signals stimulate neurogenesis in the electrocommunication circuitry. (A) Experimental set up in which fish received a real, one-way social electric signal from a conspecific (top) or an artificial sine-wave stimulus (bottom). (B) Fish exposed to direct paired social interaction or EOD stimulus alone have equivalently higher levels of neurogenesis compared to isolated fish in a neurogenic zone adjacent to the brain region controlling chirping (prepacemaker nucleus, PPn-C), but not in a neighboring control region (top). Fish receiving an artificial sine-wave stimulus show levels of neurogenesis equivalent to isolated fish (bottom). Asterisks indicate significantly different than isolated group. Adapted and modified from Dunlap et al. (2008).