Pesq. Vet. Bras. 32 (7) The distribution of the nervus ϔibularis communis was analyzed in 30 equine fetuses, mongrel, from the collection of the Animal Anatomy Laboratory at the School of Veterinary Medicine of Universidade Federal de Uberlândia, which were injected and stored in an aqueous solution of 10% formaldehyde. It was found that this nerve emerges from the ischiadicus, divides itself into nervus ϔibularis profundus and nervus ϔibularis superϔicialis distributing to the musculi extensor digitorum lateralis, extensor digitorum longus, ϔibularis tertius, and tibialis cranialis. Drawing an imaginary line in the medial-lateral region of the tuberositatis tibia, the nervus ϔibularis communis may be blocked in its proximal portion, in the caudal third, between the tendon of insertion of the biceps femoris and the lateral side of the musculus gastrocnemius (medium third); and the nervus ϔibularis profundus may be blocked in the proximal tibia, cranio-distally to the nervus ϔibularis communis. The block of nervus ϔibularis profundus may be performed in two regions of the tibia: proximal, considering the imaginary line, distal to the site referred to the nervus ϔibularis communis, and caudal to that described for the nervus ϔibularis profundus; and distal, on the lateral side of the tibiotarsal joint, between the tendons of insertion of the musculi extensor digitorum lateralis and extensor digitorum longus.