# How to find primary sources of information?

**URL:** <https://community.brain-map.org/t/how-to-find-primary-sources-of-information/760>\
**Category:** Science\
**Tags:** anatomy, analysis, atlas-reference-maps\
**Created:** [November 3, 2020, 6:00pm UTC](https://community.brain-map.org/t/how-to-find-primary-sources-of-information/760 "2020-11-03T18:00:22Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![jeremyinseattle](https://yyz1.discourse-cdn.com/flex027/user_avatar/community.brain-map.org/jeremyinseattle/32/50_2.png) [@jeremyinseattle](https://community.brain-map.org/u/jeremyinseattle)\
**Post date:** [November 3, 2020, 6:00pm UTC](https://community.brain-map.org/t/how-to-find-primary-sources-of-information/760/1 "2020-11-03T18:00:22Z")

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_(Topic from @Ruslan82)_

Certain nuclear divisions can be seen on the atlas Аlen of the human brain. For example, BNST is divided like this:

[atlas.brain-map.org](http://atlas.brain-map.org/atlas?atlas=265297126#atlas=265297126&plate=112282627&structure=10384&x=12628.28125&y=64714.36328125&zoom=-6&resolution=124.36&z=4)

![Снимок экрана 2020-11-03 в 10.45.47](https://canada1.discourse-cdn.com/flex027/uploads/brainobservatory/original/1X/da92afdec16af8b781c3ebf139be4f856f21ad9a.png)

I would like to understand on what principle such a division comes? Is there any original article, or is this an author’s division?

Of particular interest are the inputs / outputs to these divisions. I hope to find them when will find describing the principles by which such a division was made.

The same applies to two other nuclei: LSN (lateral septal nucleus), and PAG (periaqueductal gray substance).

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**Author:** ![brain](https://yyz1.discourse-cdn.com/flex027/user_avatar/community.brain-map.org/brain/32/38_2.png) [@brain](https://community.brain-map.org/u/brain)\
**Post date:** [November 3, 2020, 10:45pm UTC](https://community.brain-map.org/t/how-to-find-primary-sources-of-information/760/2 "2020-11-03T22:45:17Z")

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Detailed references on the development and annotation of reference atlases (including delineation of anatomical boundaries) can be accessed in the publications, **Supplemental Materials** and **Documentation** associated with each atlas.

> **[Allen Reference Atlases :: Atlas Viewer](http://atlas.brain-map.org/)**