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. 2019 Jan 31;122(4):525–531. doi: 10.1016/j.bja.2019.01.004

Fig 1.

Fig 1

High-resolution ultrasound image of the anatomical position of the ulnar nerve at the forearm between the superior flexor digitorum muscle (SFDM), profoundus flexor digitorum muscle (PFDM), and the flexor carpi ulnaris muscle (FCUM). The ulnar nerve (indicated by the arrow) appears at this anatomical position as a triangular structure and was the standardised site of nerve blockade.