Motor branches of the ulnar nerve to the forearm: an anatomical study and guidelines for selective neurectomy

Surgical and Radiologic Anatomy : SRA
Renata Paulos, Caroline Leclercq

Abstract

Precise knowledge of motor nerve branches is critical to plan selective neurectomies for the treatment of spastic limbs. Our objective is to describe the muscular branching pattern of the ulnar nerve in the forearm and suggest an ideal surgical approach for selective neurectomy of the flexor carpi ulnaris. The ulnar nerve was dissected under loop magnification in 20 upper limbs of fresh frozen cadavers and its branches to the flexor carpi ulnaris muscle (FCU) and to the flexor digitorum profundus muscle (FDP) were quantified. We measured their diameter, length and distance between their origin and the medial epicondyle. The point where the ulnar artery joined the nerve was observed. The position in which the ulnar nerve gave off each branch was noted (ulnar, posterior or radial) and the Martin-Gruber connection, when present, had its origin observed and its diameter measured. The ulnar nerve gave off two to five muscular branches, among which, one to four to the FCU and one or two to the FDP. In all cases, the first branch was to the FCU. It arose on average 1.4 cm distal to the epicondyle, but in four specimens it arose above or at the level of the medial epicondyle (2.0 cm above in one case, 1.5 cm above in two cases, and at ...Continue Reading

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Citations

Jul 20, 2016·The American Journal of Emergency Medicine·Harun Yasin TuzunErgin Coşkun
Dec 10, 2015·Surgical and Radiologic Anatomy : SRA·Catalina Parot, Caroline Leclercq
Dec 9, 2017·EFORT Open Reviews·Petros Mikalef, Dominic Power
Jul 15, 2021·The Journal of Hand Surgery, European Volume·Caroline LeclercqMarcello Fulchignoni

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