Intramuscular innervation patterns of the brachialis muscle.
Clin Anat
; 28(1): 123-7, 2015 Jan.
Article
em En
| MEDLINE
| ID: mdl-24596238
ABSTRACT
The aim of this study was to provide accurate anatomical descriptions of the patterns of innervation of the brachialis muscle by the musculocutaneous, radial, and median nerves. Sihler's staining method was applied to 20 brachialis muscles from 10 cadavers to reveal the intramuscular distribution patterns of the musculocutaneous, radial, and median nerves. Three patterns of innervation of the brachialis muscle by the three studied nerves were found single, double, and triple. These innervation patterns were categorized into four types Type I--only the musculocutaneous nerve; Type II--double innervation by the musculocutaneous and radial nerves; Type III--double innervation by the musculocutaneous and median nerves; and Type IV--triple innervation by all three nerves. Single, double, and triple innervation patterns occurred 25%, 70% (Type II, 55%; Type III, 15%), and 5% of the samples, respectively. The brachialis muscle is not solely innervated by the musculocutaneous nerve but also by the radial and median nerves, thus making it a potentially triply innervated muscle. Double innervation of this muscle with either the musculocutaneous and median nerve or the musculocutaneous and radial nerves was also observed.
Palavras-chave
Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Braço
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Nervo Radial
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Músculo Esquelético
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Nervo Mediano
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Nervo Musculocutâneo
Limite:
Aged
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Aged80
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
Clin Anat
Assunto da revista:
ANATOMIA
Ano de publicação:
2015
Tipo de documento:
Article