Collateralization patterns of principal basolateral amygdala neurons delineate distinct output streams

The basolateral amygdala (BLA) projects to many brain regions through which it influences multiple functions. However, there is disagreement regarding the extent to which BLA axons collateralize. Using viral tracing, we found that distinct groups of BLA neurons send axon collaterals to different subsets of targets. A first group of BLA neurons projects to a hitherto underestimated combination of...