Морфология сегментальной иннервации в связи с дифференциацией метамерии тела

Abstract

The investigation of segmental innervation in the rabbit, cat, dog, horse, sheep and cattle carried out by in-trunk preparation and by means of the degeneration method gave a full picture of distribution of segment nerve fibres. The obtained material showed that multisegment innervation of skin, muscles and bones, which is of great compensatory importance, was formed as a result of the differentiation, change and complication of the primary segmentation. The multisegment innervation has certain regularities, on the basis of which the traces of embryonic processes of displacement, merging, splitting of different rudiments can be detected. Taking into account the number of different neurotonic fibres, it is possible to reproduce the embryonic processes, more completely detect new regularities (the presence of axis nerve, replacements of the limb, its turn, concentration etc.) and explain some variations of the peripheral nervous system. Thus it cannot be said that there is no segmental innervation in the mentioned animals— it only becomes much more complicated, but it is submitted to the regularities stated above.