[Synaptic structure of human cerebral cortex in chronic hypoxia and epileptic changes in the brain]

Comparative quantitative analysis of the synaptic pool of the neuropil in the molecular layer at the temporal epilepsy and cerebral chronic hypoxia (brain tumor, that is not accompanied with a convulsive syndrome) has been performed using biopsy material. As a control the brain of practically healthy persons, who died a sudden death, has been used. The contrasting method of the phosphoric tungsten acid alcohol solution and OsO4 has been applied. An essential complication in the cerebral cortex synaptic structure in the zone with a regular epileptic activity, as well as preservation of quantitative density of synapses near to the control level at epilepsy have been revealed. At the chronic hypoxia simplification in organization of interneuronal connections at the level of synapses and reduction in the quantitative density of synapses have been noted. The complication of the cerebral cortex synaptic structure and epileptic changes++ of the brain is considered as an increase in the neuropil informativity, contributing to keeping a long-term memory about the character of epileptic manifestations.