[Dynamics of neural connection remodeling in rat superior cervical ganglion after dosated preganglionic trunk compression].

The objective of this study was to obtain a quantitative characteristic of posttraumatic regeneration of neural connections in the superior cervical ganglion (SCG) using the ratio of ganglionic neurons (N) to preganglionic myelinated axons (A) in the cervical sympathetic trunk (N/A) as an index of this process. Light and electron microscopy methods were used to study albino male rats which were divided into three groups: intact animals (7 months-old), age control group (19 months-old animals) and experimental group (1 year after compression of sympathetic trunk at SCG base made at the age of 7 months). The results have demonstrated that in intact animals N/A index was equal to 1:210. In the age control group it became equal to 1:173 and ione year after the compression--to 1:745. These data may indicate that the normalization of the neural connections in the SCG did not occur. The process of posttraumatic regeneration was not completed and became chronic.