Collateral Projections from the Lateral Parabrachial Nucleus to the Central Amygdaloid Nucleus and the Ventral Tegmental Area in the Rat

PB (Parabrachial nucleus) UBERON:0007634 projects to CEA (central amygdaloid nucleus) UBERON:0002883 · Rat

Fluoro-gold injected into the right CeA retrogradely labeled many neurons across the rostrocaudal LPB, on both sides but mostly ipsilateral. About 86% of these FG-labeled cells were CGRP-immunoreactive, and about 11% were also labeled from a VTA injection, indicating collateral projections.

Results, 'Neurons in the LPB Sent Collateral Projections to the CeA and VTA'; Fig. 2; Tables 1-2

Made by an AI model reading the paper (claude-opus-5-5, extract@0.3.0); a second AI model (claude-opus-5-5) agrees.

PB (Parabrachial nucleus) UBERON:0007634 projects to VTA (Ventral tegmental area) UBERON:0002691 · Rat

Tetramethylrhodamine-dextran injected into the right VTA retrogradely labeled many LPB neurons bilaterally with an ipsilateral predominance. About 27% of these cells were CGRP-positive, and about 13% were also labeled from the CeA injection, consistent with axon collaterals to both targets.

Results, 'Neurons in the LPB Sent Collateral Projections to the CeA and VTA'; Fig. 2; Tables 1-2

Made by an AI model reading the paper (claude-opus-5-5, extract@0.3.0); a second AI model (claude-opus-5-5) agrees.