A bifurcation of the median antebrachial vein produces the (medial) intermediate basilic vein and the (lateral) intermediate cephalic vein; the two veins produced by such a split may replace the median cubital vein.
The branching of the median antebrachial vein gives rise to the medial intermediate basilic vein and the lateral intermediate cephalic vein, which can assume the function of the median cubital vein in certain situations.