Figure 2
From: Sonographic swelling of pronator quadratus muscle in patients with occult bone injury
Sonographic longitudinal image of the examined part of the distal forearm, including anatomical reference and measurements of PQ thickness, using a 17-MHz transducer. Left hand of a 33-year-old healthy male volunteer. We referred to the line tangential to the volar concave aspect of the radius. FCR: flexor carpi radialis; PQ: pronator quadratus; R: radius; full-lined arrow: maximum thickness of the PQ.