# Same-cohort Z-Anatomy muscle recovery

Adapted anatomy geometry: Creative Commons Attribution-ShareAlike 4.0 International, https://creativecommons.org/licenses/by-sa/4.0/

Z-Anatomy — The libre 3D atlas of anatomy — CC-BY-SA 4.0.
BodyParts3D — The Database Center for Life Science — CC-BY-SA 2.1 Japan.
Original model: Kousaku OKUBO. Design, 3D and anatomy: Gauthier KERVYN.
Full upstream contributor and source notices: SOURCE-LICENSE.txt.

Pinned source: https://github.com/Z-Anatomy/Models-of-human-anatomy/tree/e38ea5e6c7e22d229a975f3fde563a5aca52099e
Archive: https://raw.githubusercontent.com/Z-Anatomy/Models-of-human-anatomy/e38ea5e6c7e22d229a975f3fde563a5aca52099e/Z-Anatomy.zip

Adaptation 8 October 2026: selective extraction of source muscle objects and their polygon-assigned tendon surfaces absent from the existing Atlas catalogue; transforms applied, source world axes (x,y,z) converted to atlas (x,z,-y) in metres, triangulated, normals quantized to signed 16-bit values, packed into binary geometry. No inflation, reshaping, pathology or donor substitution. Original sourceObject and sourceMaterial retained in manifest.json. Geometry and catalogue are CC BY-SA 4.0; authoring scripts are reproduction aids. No endorsement implied.

The original library's Muscles collection was loaded with Blender factory settings and auto-execution disabled. Bundled Python add-ons were neither extracted nor run. No organs, reproductive structures, internal ocular muscles, pelvic-floor structures, kidney or inner-ear geometry is in the exported supplement. The upstream licence does not map individual objects to individual contributors; this is a scoped musculoskeletal reuse assessment, not an independent legal certification.

The separately authored modesty-shorts asset is an original NON-ANATOMICAL opaque privacy garment, CC0-1.0. It is not source anatomy, a skin model or a clinical representation. Earlier technical render previews combined existing same-cohort musculoskeletal/bone geometry and the recovered muscles with this garment. The current whole-body viewer does not display it. Those previews were technical visual checks, not clinical validation.