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KMID : 0855520130260030097
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Korean Journal of Physical Anthropology
2013 Volume.26 No. 3 p.97 ~ p.100
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The Third Head of Biceps Brachii Muscle in Korean - Anatomical Study
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Lee Je-Hun
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Abstract
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The goal of this study was to investigate the incidence of third head of biceps brachii (THBB) for understanding unexpected cases in clinical practice.
The sample consisted of 214 upper extremities from 107 adult cadavers donated to science (70 males and 37 females; age, 51-87 years). Cases with pathological changes or trauma to the upper limbs were excluded.
THBB was found in 14 of the 214 upper extremities. The incidence of variation was approximately 6.5%. THBB was found in 10 male limbs and 4 female limbs, and none of the cases was bilateral. THBB was a flat muscular belly-like structure that originated from the anteromedial surface of the humerus between the insertion of the coracobrachialis and the origin of the brachialis.
This finding may be clinically important because the musculocutaneous nerve is subjected to compression by the bulky third head.
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KEYWORD
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Third head, Biceps brachii, Musculocutaneous nerve, Anatomy
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