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Pronation is an anatomical term to describe a rotation movement. Such movement can occur in the forearm (at the radioulnar joint) and the foot (at the subtalar and talocalcaneonavicular joints).
For the forearm, when standing in the anatomical position pronation will move the palm of the hand from an anterior-facing position to a posterior-facing position without an associated movement at the shoulder (gleno-humeral joint). For the foot pronation will cause the sole of the foot to face more laterally than when standing in the anatomical position.
Pronation is the opposite of supination.
Pronation of the Forearm
Pronation of the forearm should not be confused with medial rotation of the shoulder. When standing in the anatomical position, medial rotation of the shoulder can perform part of the movement to change the palm from facing anteriorly to posteriorly. Pronation of the forearm occurrs at the radioulnar joint so such a movement does not constitute it. To isolate medial rotation in the shoulder from pronation of the forearm one can stand with ones elbows tucked against the trunk, with the elbows flexed to 90 degrees with the forearms pointing directly in front of the body with the palms of the hands facing upwards. Keeping ones elbows tucked at the sides, the act of moving ones forearms so that the palms are facing downwards is pronation of the forearm.
Pronation of the Foot
The pronated foot is one in which the heel bone angles inward and the arch tends to collapse. A "knock-kneed" person has overly pronated feet. This flattens the arch as the foot strikes the ground in order to absorb shock when the heel hits the ground, and to assist in balance during mid-stance. If habits develop, this action can lead to foot pain as well as knee pain, shin splints, achilles tendonitits and plantar fasciitis..
- Kendall FP, McCreary EK and Provance PG. (1993).Muscles Testing and Function. 4th Edition. Lippincott Williams and Wilkins. Philidelphia. ISBN 0-683-04576-8.
- Brukner P and Khan K. (1993). Clinical Sports Medicine. 1st Edition. McGraw-Hill Book Company. Sydney. ISBN 0-07-452852-1.
- "Common Foot Problems".
- capitulum of the humerus
- radial notch
- proximal radioulnar articulation
- distal radioulnar articulation
- annular ligament
- Anatomy at Dartmouth elbow/surface/surface5
- pronation at eMedicine Dictionary
- Pronation at the US National Library of Medicine Medical Subject Headings (MeSH)