EN
The proximal phalanges, especially those of the thoracic limbs of horses, are the ones most exposed to injuries in the species. Due to unequal loading of the lateral pastern bones resulting from the specific training of racehorses in Poland and from the way races are conducted, the authors of the publication aimed at a detailed quantitative profile based on a radiogram analysis of the lateral proximal phalanges of the thoracic limbs of such horses. It seemed to be interesting also due to the fact that there is hardly any information in literature concerning asymmetry between the lateral long bones in the species. It turned out that the differences concerning the structure of the spongious substance between the bilateral pastern bones in the studied group of horses are not statistically significant. It was also stated that there is a strong positive correlation between the parameters mentioned above as far as the proximal phalanx of the right thoracic limb and the left one were concerned.