What brain atlases and datasets are available on brain-map.org?

brain-map.org is the public web platform of the Allen Institute for Brain Science, and it hosts large-scale, publicly available brain datasets organized around research areas including anatomy, cell types, circuits and behavior, connectivity, gene expression, and computational modeling. The most widely cited resources are the anatomical reference atlases, which provide data-driven, high-resolution maps of the mammalian brain across species and developmental stages. The platform also offers the Allen Brain Observatory and other datasets that reveal neuronal circuitry and connectivity.

Anatomical reference atlases

These atlases define standard anatomical spaces that let researchers compare data across experiments, species, and ages. According to the site, they are among the Institute's most widely cited resources.

A key point is that these atlases are reference spaces, not just images. They give you a standard coordinate framework so that cell types, gene expression, and connectivity data from different studies can be aligned and compared.

Other public datasets and resources

Beyond the atlases, the platform organizes resources by research focus area:

• Cell Types & Taxonomies — data-driven classifications and key publications analyzing cell types of the mammalian brain.
• Circuits & Behavior — data and publications from the Allen Brain Observatory that reveal the complexity of neuronal circuitry.
• Connectivity — multiscale datasets and publications on how the brain is wired.
• Gene Expression — highlights and insights viewed through Allen Brain Atlas datasets and publications.
• Computational Modeling & Theory — brain-wide, circuit-level, and cell-level biophysical models, modeling tools, and publications.
• Genetic Tools, Computational Tools, and Hardware — biological and technical resources, analysis tools, and custom instrument designs created by Institute scientists.

The Brain Knowledge Platform is described as the knowledge-centered scientific workbench that ties this work together.

How to access and use these resources

1. Go to brain-map.org.
2. Use the Atlases entry to reach the large-scale, publicly available datasets and products, or browse by Research Focus Areas if you already know the discipline you need.
3. Pick the atlas or dataset matching your species and developmental stage — for example, Adult Mouse for coronal and sagittal sections, or Developing Mouse if your work spans embryonic and postnatal stages.
4. Confirm the annotation scheme before comparing data. The Adult Human atlas, for instance, uses modified Brodmann or gyral annotation, which affects how regions are labeled.
5. For circuitry questions, start from Circuits & Behavior and the Allen Brain Observatory rather than the anatomy atlases.

The site states these datasets and products are publicly available. It does not publish pricing or login requirements in the material reviewed here, so check the individual resource page for any access conditions before planning a large download or analysis pipeline.

Common sticking points

• Matching species and stage. Choosing an adult atlas for a developmental question will misalign your data; use the Developing Mouse or Developing Human atlas instead.
• Annotation differences. Human and mouse atlases do not use identical labeling schemes, so cross-species comparisons need an explicit mapping step.
• Scope of each resource. Anatomy atlases give you structure and reference space; connectivity and circuit data live in separate programs such as Connectivity and the Allen Brain Observatory.