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 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.
Department of Anatomy, Center for Basic Sciences, Kasturba Medical College, Bejai, Mangalore, Karnataka, India. ranjanbhatana@gmail.com
Soubhagya R
SR
Nayak
R Nayak
RN
Soubhagya
Ashwin
A
Krishnamurthy
Krishnamurthy
K
Ashwin
Madhan
M
Kumar
Kumar S J
KS
Madhan
Latha V
LV
Prabhu
V Prabhu
VP
Latha
Vasudha
V
Saralaya
Saralaya
S
Vasudha
Merin M
MM
Thomas
M Thomas
MT
Merin
D000368:Aged; D001132:Arm / Q000033:anatomy & histology*; D001916:Brachial Artery / Q000002:abnormalities*; D001917:Brachial Plexus / Q000166:cytology*; D006801:Humans; D007194:India; D008297:Male; D018482:Muscle, Skeletal / Q000002:abnormalities* / Q000098:blood supply* / Q000294:innervation*