Origin
The attachment generally treated as the more fixed end when the muscle contracts.
Full-body reference
Follow the muscle.
Understand the pattern.
This Atlas explains how muscles attach, what they do, where they contribute in everyday movement, and which nearby structures may take on more work when their contribution changes.
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All regions
Full-body index
No muscles match that search.
Try a muscle name, action such as “rotation,” or a body area such as “hip.”
How to read the Atlas
Information, not diagnosis.
Insertion
The attachment generally treated as the more movable end during a described action.
Contribution
A muscle can assist, stabilize, guide, or resist movement—not only create it.
Connection
Linked muscles share a movement, joint, body region, or common load-management role.
Public education edition
What this Atlas does—and does not—include.
This edition provides general anatomy and movement education. It intentionally does not publish Calgary Muscle Activation’s practitioner testing, activation procedures, treatment sequencing, decision trees, or individual clinical interpretation.
Muscle weakness, pain, posture, and movement are complex. The relationships described here are possibilities for education, not proof of a diagnosis or a treatment recommendation.