PB (Parabrachial nucleus) synapses onto CEA (Central amygdalar nucleus)

In the right CeA of 3 mice, CGRP-immunoreactive terminals, which the authors treat as the parabrachial input, formed synapses mainly on dendrites (about 57%), and also on spines (about 24%) and somata (about 19%). Synapses were roughly evenly split between symmetric and asymmetric, and about two thirds of CGRP+ terminals co-expressed vGluT2. The parabrachial origin is inferred from the CGRP marker; it was not traced in this study.

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