Pronator quadratus muscle :-
Muscle details :-
- a square shaped muscle on the distal forearm that acts to pronate (turn so the palm faces downwards) the hand.
- Lower quarter of anteromedial shaft of ulna .
- Lower quarter of anterolateral shaft of radius and some interosseous membrane .
Nerve supply :-
- Anterior interosseous nerve (C8).
- Pronates forearm and maintains ulna and radius opposed .
Pronation deformity of the right forearm in a spastic form of cerebral palsy before surgery .