[Features of the structure of the dorsal branches of spinal nerves of fetuses, newborn infants and adults].
Age peculiarities in the structure of all spinal nerve dorsal branches were studied in 70 preparations obtained from 35 corpses of fetuses (23), newborns (2) and mature persons (10). The method of anatomical macro-micropreparation by means of stereoscopic microscope MBC-2 after V. P. Vorobiov was used. It has been stated that age peculiarities of the dorsal nerves manifest themselves as uneven enlargement of their trunks, that, to some extent, corresponds to different development of deep dorsal muscles in various parts of the spinal column (it is less evident in fetuses and newborns), as well as a decreased slope angle of mature person nerves, especially in dolichomorphous type of build. The latter is mostly pronounced in the lower thoracic and lumbar areas and is combined with a predominant growth of the lumbar part of the spinal column. With age, the nerve trunks not only grow longer and thicker, but their branchings become complicated with increasing zones of their spread and enlargement of their connections.
D000367:Age Factors; D000368:Aged; D006801:Humans; D007231:Infant, Newborn; D008875:Middle Aged; D013127:Spinal Nerves / Q000033:anatomy & histology* / Q000196:embryology
Osobennosti stroeniia dorsal'nykh etveĭ spinomozgovykh nervov u plodov, novorozhdennykh i vzroslykh.