Supernumerary humeral heads of the biceps brachii muscle revisited

Supernumerary humeral heads of the biceps brachii muscle were found in 27 (15.4%) of 175 cadavers. They were bilateral in five cadavers and unilateral in 22 (8 left, 14 right), giving a total of 32 examples in 350 arms (9.1%). Depending on their origin and location, the supernumerary heads were clas...

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Bibliographic Details
Published in:Clinical anatomy (New York, N.Y.) N.Y.), 2003-05, Vol.16 (3), p.197-203
Main Authors: Rodríguez-Niedenführ, Marc, Vázquez, Teresa, Choi, David, Parkin, Ian, Sañudo, José R.
Format: Article
Language:English
Subjects:
Aged
Aged, 80 and over
Arm - anatomy & histology
arm muscles
biceps brachii
Cadaver
Female
Humans
Male
Middle Aged
Muscle, Skeletal - anatomy & histology
Muscle, Skeletal - blood supply
Muscle, Skeletal - innervation
muscular variations
supernumerary heads
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Summary:Supernumerary humeral heads of the biceps brachii muscle were found in 27 (15.4%) of 175 cadavers. They were bilateral in five cadavers and unilateral in 22 (8 left, 14 right), giving a total of 32 examples in 350 arms (9.1%). Depending on their origin and location, the supernumerary heads were classified as superior, infero‐medial, and infero‐lateral humeral heads. Previous studies were reviewed using this classification. The infero‐medial humeral head was observed in 31 of 350 (9%) arms and was therefore the most common variation. The superior humeral head was observed in five (1.5%). The infero‐lateral humeral head was the least common variation, observed only in one (0.3%) of 350 arms. A biceps brachii with three heads was observed in 27 of 350 (7.7%) arms and with four heads in five (1.4%) arms. Clin. Anat. 16:197–203, 2003. © 2003 Wiley‐Liss, Inc.
ISSN:0897-3806
1098-2353
DOI:10.1002/ca.10060