Fig. 4.

Neurocircuitry of the LHAad using retrobead injections. a Injections into the LHAad resulted in dense retrobead expression in the prelimbic PFC (b, c). Injections into the VTA (d) resulted in moderate expression in the LHAad (e). Injections into the (f) prelimbic PFC resulted in moderate expression in the LHAad (g). Injections into the h nucleus accumbens i resulted in minimal expression in the LHAad. j Quantification of the density of RB+ cells/mm². k Summary of LHAad neurocircuitry receiving robust prelimbic PFC (thicker arrow) inputs, while providing moderate outputs (thin arrows) to the prelimbic PFC and VTA (N = 17 total: 6 VTA; 4 LHAad; 3 prelimbic PFC; 4 NA)