Comparative Anatomical Studies of Nervus Musculocutaneus in Mammals

Morphology of nervus musculocutaneus and its ramifications in repre-sentatives of ten orders of mammals was studied. The investigations showed that there are fairly considerable differences in the morphology and topography of nervus musculocutaneus in different species, in res-pect of the trunk itself of this nerve and of its ramifications. In diffe-rent species this trunk possesses a different degree of anastomosis with nervus medianus: from complete separation, through the intermediate stages, to complete junction in one common nerve trunk. Nervus cuta-neus antebrachii medialis, which forms a sort of terminal extension of nervus musculocutaneus, innervates areas varying in extent in different species, from innervation of the upper part only of the medial side of the skin of the forearm to its passage into nervi digitales dorsales I, II, III and also (exceptionally) into nervi digitales palmares communes 1, II, III