Origin
Ulna
Insertion
Radius
Blood supply
Anterior interosseous artery.
Nerve supply
Anterior interosseous nerve.
Action
It acts to pronate the forearm. Pronation means turning the forearm so that it faces palm-down. Certain sports including swimming require major use of the pronator quadratus.
Disease/Injury
Pronator quadratus tendonitis may occur as a result of activities involving excessive use of the muscle.
Muscle Exercise
Pronation exercises at the wrist joint using machine or dumbbells help to strengthen the pronator quadratus muscle.
Interesting facts
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