Projections from the posterolateral olfactory amygdala to the ventral striatum: neural basis for reinforcing properties of chemical stimuli

COA (cortical amygdaloid nucleus) UBERON:0002891 projects to OT (Olfactory tubercle) UBERON:0001883 · Rat

Fluoro-Gold injected into layers II-III of the caudal olfactory tubercle retrogradely labelled a number of cells in layer II of the posterolateral cortical amygdaloid nucleus.

Fig. 4A,B

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.

MOB (Main olfactory bulb) UBERON:0009951 projects to OT (Olfactory tubercle) UBERON:0001883 · Rat

After biotinylated dextran-amine injection into the mitral cell layer of the main olfactory bulb, labelled fibres occupied sublamina Ia of layer I across the full extent of the olfactory tubercle, thinning from lateral to medial.

Fig. 1B-D

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.

COA (cortical amygdaloid nucleus) UBERON:0002891 projects to PALv (Pallidum, ventral region) UBERON:0002778 · Rat

Anterograde dextran-amine tracing from the posterolateral cortical amygdaloid nucleus labelled only a few fibres in the ventral pallidum.

Fig. 2F; Fig. 3B

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.

BLN (basolateral amygdaloid nuclear complex) UBERON:0006107 projects to OT (Olfactory tubercle) UBERON:0001883 · Rat

Fluoro-Gold injected into the caudal olfactory tubercle also retrogradely labelled cells in the basolateral amygdaloid complex. The paper reports this but does not illustrate it.

Results, Injections in the ventral striatum (case 1207; not shown)

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.

MOB (Main olfactory bulb) UBERON:0009951 projects to COA (cortical amygdaloid nucleus) UBERON:0002891 · Rat

Olfactory bulb tracer injections produced labelled fibres in the most superficial part of layer I of the posterolateral cortical amygdaloid nucleus, where sublamina Ia was thicker than in piriform cortex.

Fig. 1E,F

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.

COA (cortical amygdaloid nucleus) UBERON:0002891 projects to ACB (Nucleus accumbens) UBERON:0001882 · Rat

A Fluoro-Gold injection confined to the accumbens core retrogradely labelled neurons in layer III of the posterolateral cortical amygdaloid nucleus.

Fig. 4C,D

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.

COA (cortical amygdaloid nucleus) UBERON:0002891 projects to ACB (Nucleus accumbens) UBERON:0001882 · Rat

Layer II injections labelled some fibres in the caudal lateral/ventrolateral shell of the accumbens. A layer III injection (case 9905) labelled the accumbens core densely.

Fig. 2E; Fig. 3D

Made by an AI model reading the paper (claude-opus-5-5, extract@0.3.0); a second AI model (claude-opus-5-5) disagrees. “The strong rating is supported only for the core after a single layer III injection, while the lateral shell got just some fibres, so the merged claim overstates strength.”

COA (cortical amygdaloid nucleus) UBERON:0002891 projects to OT (Olfactory tubercle) UBERON:0001883 · Rat

Dextran-amine injections restricted to the posterolateral cortical amygdaloid nucleus labelled a dense meshwork of fibres in layers II-III of the medial olfactory tubercle, around the medial islands of Calleja, and in the cell bridges of the ventral striatum.

Fig. 2B-F; Fig. 3B; Methodological considerations

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.