Morfologii͡a (Saint Petersburg, Russia)
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In experiment performed in 9 dogs the combined lesions of posterior supporting structures of the lumbar part of the vertebral column and of the spinal cord were modeled by partial laminectomy and left LV segment hemisection, respectively. The material was obtained at 14 days, 1 and 2-3 months following the operation. In longitudinal paraffin sections, stained with hematoxylin-eosin and according to Nissl's, Masson's and van Gieson's methods, as well as in silver nitrate-impregnated sections, the morpho-functional characteristics of the injured spinal cord segment were studied. ⋯ During 2.5 months of the experiment the total surface area of intraspinal cavities in the injury zone was found to increase more than 4 times. The total surface area of the microcavities adjacent to the injury zone in the region of left lateral cord during this period increased from 10% to 34%, while in the intermediate zone this increase was from 6% to 58%. It is concluded that the condition of spinal instability has a negative influence on the viability of the neural structures in the damaged segment of the spinal cord.
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Using macro-microanatomical approach, the study of glossopharyngeal nerve was performed on carcasses of fur animals belonging to Canidae and Mustelidae families (mink, sable, sable polar fox, fox). The species peculiarities of interconnections of tympanic nerve with inner carotid nerve and ear branch of vagus nerve were established. The characteristics of the course and connection of the carotid sinus branch of glossopharyngeal nerve with sympathetic branches of cranial cervical ganglion, were defined. The variants of total absence of vagal pharyngeal branch with significant development of similar branch of glossopharyngeal nerve, were noted.