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Define Origin
A muscle-bone attachment that doesn’t move. ‘Anchor Point’.
Define Insertion
A muscle-bone attachment that does move. ‘Bone that moves’.
Define Action
Description of movement upon contraction.
Explain Adduct
Moves toward midline
Explain Abduct
Moves away from midline
Explain Flex
Movement that decreases the joint angle
Explain Extend
Movement that increases the joint angle.
Explain Rotation
Moves medial/lateral.
Explain Elevate
Moves superiorly
Explain Depress
Moves inferiorly
