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Title in Portuguese: A rare case of absence of the lateral cutaneous nerve of forearm: case report
Author: Silveira, Helson Freitas da
Lucena, Jalles Dantas de
Sobrinho, Osvaldo Pereira da Costa
Pessoa, Roberta Silva
Cerqueira, Gilberto Santos
Oliveira, André de Sá Braga
Ribeiro Júnior, Howard Lopes
Keywords: Extremidade Superior
Upper Extremity
Median Nerve
Nervo Mediano
Musculocutaneous Nerve
Nervo Musculocutâneo
Brachial Plexus
Plexo Braquial
Issue Date: Apr-2019
Publisher: Journal of Morphological Sciences
Citation: SILVEIRA, Helson Freitas da et al. A rare case of absence of the lateral cutaneous nerve of forearm: case report. J Morphol Sci, v. 36, n. 2, p. 129–133, abr. 2019.
Abstract: Introduction Variations in the formation and in the branching pattern of the brachial plexus are common. Numerous anastomotic variations between the musculocutaneous nerve (MCN) and the median nerve (MN) have been reported and could be implicated in a wide range of sensory and motor dysfunctions. Objective To report an uncommon case of an anastomotic variation between the MN and the MCN with a rare absence of the lateral cutaneous nerve of forearm (LCNF). Material and Methods A dissection of a male cadaver was performed at the Morphology Department of the Universidade Federal do Ceará, Fortaleza, state of Ceará, Brazil. The brachial plexus was exposed. Results It was observed that the MCN, after its origin in the lateral fasciculus of the brachial plexus, anastomoses with the MN in the middle third of the arm. It diverges from themost prevalent anatomical pattern, inwhich theMCNcontinues to passdistallybeneath the brachii biceps, originating the LCNF. In this case, the MCN does not emit its main terminal branch, the LCNF,which innervates the lateral portion of the skin of the forearm. In the present case, the innervation of the lateral portion of the skin of the forearmis provided by radial nerve branches. The reported case has practical implications, since the absence of the LCNF could cause hypoesthesia in the skin of the forearm. Conclusion Thus, the knowledge of the formation and of the branching pattern of the brachial plexus is clinically important for the correct clinical interpretation of the sensory and motor disorders of the upper limbs caused by peripheral nerve injuries, as well as for planning surgical procedures to correct upper limb traumas.
metadata.dc.type: Artigo de Periódico
ISSN: 2177-0298
Appears in Collections:DMO - Artigos publicados em revistas científicas

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