Examination of 93 feet o f 50 adult Macacus cyclopsis on the distribution and course of the superficial veins of the dorsal and plantar sides of the foot was done and the following results were obtained.
I. Veins of the dorsum of the footVeins of the dorsum of th e foot include the V. digitalis pedis dorsalis distributed to each toe and continuations of this vein; the V. marginalis fibularis, the Vv. digitales communes, and the V. marginalis tibialis as well as the Vv. dorsales pedis superficialis which accompany the A. dorsales pedis superficialis.
1. The Vv. digitalis pedis dorsales
This vein which begins a t the tip of each toe runs toward the dorsum of the foot along the medial and lateral sides of the back of the toe. There is a tibial branch and a fibular branch, one of which may be either smaller than the other or absent. When it is small or absent, it is usually the one on the fibular side in the first, second and third toes and the branch on the tibial side in the fourth and fifth toe.
1) The branch running along the tibial side of the first toe is called the V. tibialis hallucis and continues with the V. marginalis tibialis that runs along the tibial edge of the dorsu m of the foot. Further, during its course, it receive a small vei n from the plantar side and becomes the R adix tibialis V. saphena parva at near the Malleolus medialis. This branch i s never absent.
2) The branch on the fibular side of the fifth toe is the V. fibularis digitalis V which continues upward along the fibural side of the foot and later alters its course slightly toward the tibial side of the dorsum of the foot. After uniting with the V. obliqua dorsalis it receives veins from the plantar side as it runs to the upper anterior portion of the Malleolus lateralis where it continues with the Radix fibularis V. saphena parava. Furthermore, the Radix fibularis and Radis tibialis unite at the lower dorsal side of the leg to become the V. saphena parva. In very rare cases, it is absent.
3) With regard to other Vv. digitales pedis dorsales those on opposing sides unite and, after receiving veins from the plantar side at the region of the proximal phalanx, form the Vv. digitales communes I to IV, respectively.
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