# Anatomy and highlight-region attribution

All anatomy model assets and derived metadata in this directory remain under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Retain this attribution with redistributed assets; modified anatomy assets remain under that license.

Compact viewer credit: Anatomy: Z-Anatomy / BodyParts3D (DBCLS), adapted via Brain Project · CC BY-SA 4.0.

Source: [Brain Project by itayinbarr](https://github.com/itayinbarr/brainproject), downloaded September 9, 2026; based on [Z-Anatomy contributors](https://github.com/Z-Anatomy/Models-of-human-anatomy) and [BodyParts3D, © The Database Center for Life Science (DBCLS)](https://lifesciencedb.jp/bp3d/). Original source files and license are retained locally in `anatomy-v2/source/`; the exact source revision is recorded in its `commit.json`.

Z-Anatomy's requested source attributions are “BodyParts3D - The Database Center for Life Science - CC-BY-SA 2.1 Japan” and “Z-Anatomy - The libre 3D atlas of anatomy - CC-BY-SA 4.0”. This derived model follows the source distributor's CC BY-SA 4.0 license.

The retained base model also includes these credited atlas additions:

- CIT168 subcortical atlas, Pauli, Nili & Tyszka (2018), Scientific Data — [source](https://osf.io/jkzwp/), CC BY 4.0.
- CIT168 amygdala atlas, Tyszka & Pauli (2016) — [source](https://osf.io/hksa6/), CC BY-SA 4.0.
- In-vivo probabilistic atlas of human thalamic nuclei, Najdenovska et al. (2018), Scientific Data — [source](https://doi.org/10.5281/zenodo.1405484), CC BY-SA 4.0.
- Hypothalamic region atlas, Neudorfer et al. (2020), Scientific Data — [source](https://doi.org/10.5281/zenodo.3942115), CC BY 4.0.
- HCP1065 population-averaged white-matter tract templates, Yeh (2022), Human Connectome Project. The source identifies these geometry additions as CC BY-SA 4.0; see [registration documentation](https://github.com/itayinbarr/brainproject/blob/main/docs/registration.md).

Earlier adaptation grouped anatomical structures by hemisphere, centered/scaled the model, recolored it, and reduced polygon density for browser rendering. Version 4 preserves all 40 version 3 base meshes, material definitions, geometry buffers, and anatomical metadata unchanged. It appends six separate highlight overlays, extracted from existing source atlas segments and aligned using the same transformation. They are hidden by metadata and fully transparent by default. No anatomical boundary was fabricated.

Highlight scope: the orbitofrontal overlays contain only the source “Orbital gyri” meshes. The anterior cingulate overlays contain only “Cingulate gyrus and sulcus (Middle anterior part)”. The insula overlays use the source's composite “Insula (Subcentral gyrus and ant. and post. sulci)” meshes. These source regions do not purport to define complete functional or cytoarchitectonic areas. Exact source IDs, names, positions, and triangle counts are in `highlight-manifest.json`.

Coordinates remain positive X anatomical left, positive Y superior, positive Z anterior. Model is centered, approximately four scene units across its largest dimension. Registered deep structures remain approximate educational atlas anatomy, with upstream registration error described as approximately 7 mm; this is not patient-specific imaging.