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Anatomy
Anatomy
Flexion
Evidence-grounded — sourced from Fysiqal's fitness knowledge graph· 1 min read
movement-terminologyjoint-motionflexion
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In one line
Bending a joint so the bones come closer together.
Detail
Flexion is a bending movement that brings bones together. Examples include bending the elbow joint to draw the hand toward the shoulder, and bending the knee in the lower extremity. An important exception applies to the shoulder joint: moving the humerus to the front from the side is considered flexion of the shoulder joint (not adduction). Source attributes the movement terminology to Thompson (1989).
Key facts
- Flexion = bending; bringing bones together.
- Elbow example: hand drawn toward the shoulder.
- Knee example: bending the knee.
- Shoulder exception: moving the humerus forward from the side is shoulder flexion.
Connections
- extension — the opposite (straightening) movement.
- horizontal-flexion-adduction — a horizontal-plane variant at the shoulder.
- spinal-column — spine performs flexion as one of its movements.
SourceReference manual
p.728
Cited authorities in source: Thompson (1989).
Educational content only — not medical advice. Always consult a qualified professional for individualized guidance, especially around injury, pregnancy, or medical conditions.
Explore related topics
Atlas Connections
ExtensionClosely related
Straightening a joint so the bones move apart.Horizontal Flexion (Adduction)Closely related
Drawing the humerus from the side-horizontal to the front-horizontal position.Shoulder / Arm Range of Motion
Arm flexion 135°, shoulder adduction 50°, shoulder hyperextension 45°, shoulder abduction 90–180°.Spinal Column (Vertebral Column)
A column of 33 vertebrae and 23 intervertebral discs with 4 curves that supports the trunk, protects the spinal cord, and absorbs shock.