A. Left: targeting strategy. Right: eGFP expression in D2NAc shell neurons, zoomed images are included to confirm labelling of cell bodies in NAc shell rather than core (representative example of n = 4 brains).
B. Left histology images: Orexin and MCH immunoreactivity in LH neurons that directly innervate D2NAc cells, representative examples from n = 4 brains. Right plot: incidence of orexin and MCH immunoreactivities D2NAc -projecting LH neurons (values are mean±sem and raw values for individual brains). Number above bars is p value from unpaired t-test with Welch’s correction, t,df = 8.611,4.723 (analysis of 1636 cells from 4 brains).