The pronator quadratus fascia is the fibrous sheath enclosing the pronator quadratus muscle at the distal forearm, forming the fibrous floor of the distal forearm compartment. The anterior interosseous nerve passes beneath this fascia.
| Location | Distal forearm, covering the front of pronator quadratus |
|---|---|
| Boundaries |
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Forms the deepest fascial layer of the distal anterior forearm. It is incised and later repaired in the volar approach to distal radius fractures.
In volar plate fixation of distal radius fractures, the pronator quadratus is elevated from the radius by incising its fascia. This is the subperiosteal plane used in volar plate fixation. Repair of the pronator quadratus fascia at closure restores DRUJ stability and protects the flexor tendons from contact with the plate.
The PQ fascia is incised and the muscle elevated subperiosteally to expose the distal radius volar surface for plate fixation, with fascial repair at closure reducing flexor tendon irritation.
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