Abstract
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. © 2003 Wiley-Liss, Inc.
Original language | English |
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Pages (from-to) | 197-203 |
Journal | Clinical Anatomy |
Volume | 16 |
Issue number | 3 |
DOIs | |
Publication status | Published - 28 Apr 2003 |
Keywords
- Arm muscles
- Biceps brachii
- Muscular variations
- Supernumerary heads