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Keywords

ulnar nerve
brachial plexus
neuroanatomy

How to Cite

Pereira de Macêdo, L., Ugulino Netto, A., Franke, K. ., Vansant Oliveira Eugenio, P. ., Ribeiro de Moraes Freitas, L. ., Antônio Serra de Lima Júnior, F. ., Romeiro de Paula, J. V. ., Nery Bernardino, S. ., Morais de Souza, F. H. ., S. Almeida, N. ., & Rocha Cirne Azevedo-Filho , H. . (2021). C7 contribution to the ulnar nerve: Literature review. Romanian Neurosurgery, 35(2), 215–218. Retrieved from http://www.journals.lapub.co.uk/index.php/roneurosurgery/article/view/1734

Abstract

Introduction. Classic anatomical literature frequently describes C7 contribution to ulnar nerve (UN) formation as a casual event. However, surgical practice and dissections frequently reveal a recurrent presence of a lateral cord component of the UN. This study aimed to seek through literature to establish the frequency and degree of this contribution.

Methodology. We ran a literature review searching on Pubmed, MEDLINE, Embase and Web of Science databases for ulnar nerve anatomy and described discursively the results.

Results and discussion. We found 9 articles that described quantitatively and qualitatively the contribution of C7 on the formation of the UN. The prevalence described ranged from 2 to 100%, depending on the methodology used and population characteristics. When present, studies described a contribution from 9,9% to 30,4%, sending even more fibres than T1 root on average.

Conclusion. The C7 root can be considered a frequent and important component of the ulnar nerve, explaining UN territory repercussions on C7 radiculopathies. This knowledge is important on surgical approaches, maybe avoiding iatrogenic lesions and negative outcomes.

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Romanian Neurosurgery – Journals. London Academic Publishing
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