Four-headed biceps and triceps brachii muscles, with neurovascular variation

Anatomical variations of the biceps brachii and triceps brachii have been described by various authors, but the occurrence of four-headed biceps brachii and triceps brachii in an ipsilateral arm is rare and has not been reported before in the literature. During routine cadaveric dissection in the de...

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Bibliographic Details
Published in:Anatomical science international 2008-06, Vol.83 (2), p.107-111
Main Authors: Soubhagya, R. Nayak, Ashwin, Krishnamurthy, Kumar Madhan, S. J., Latha, V. Prabhu, Vasudha, Saralaya, Merin, M. Thomas
Format: Article
Language:English
Subjects:
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Anatomy
Anatomy & physiology
Animal Anatomy
Animal Physiology
anomalous muscle
Arm - anatomy & histology
Arms
biceps brachii
Brachial Artery - abnormalities
Brachial Plexus - cytology
Case Report
Cell Biology
Histology
Human Physiology
Humans
India
Male
Medicine
Medicine & Public Health
Morphology
Muscle, Skeletal - abnormalities
Muscle, Skeletal - blood supply
Muscle, Skeletal - innervation
Muscular system
Neurons
Neurosciences
triceps brachii
variation
Veins & arteries
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Summary:Anatomical variations of the biceps brachii and triceps brachii have been described by various authors, but the occurrence of four-headed biceps brachii and triceps brachii in an ipsilateral arm is rare and has not been reported before in the literature. During routine cadaveric dissection in the department of anatomy, Kasturba Medical College, Mangalore, India, various unusual variants were noted in the left arm of a cadaver of a 67-year-old man. The variants include a four-headed biceps, a four-headed triceps, communication between the musculocutaneous and median nerves, and a high origin of deep brachial artery from the axillary artery. The occurrence of these anomalies and the clinical and morphological significance are discussed.
ISSN:1447-6959
1447-073X
DOI:10.1111/j.1447-073X.2007.00171.x