[Glutamate decarboxylase activity in the central structures of the dog brain visual analyzer in the early period of postnatal ontogenesis].

In puppies the first day after birth the glutamate decarboxylase activity in all the studied structures of the brain visual analyzer is the same. On the 12-16th day of the postnatal development it is higher in the corpora bigemina anterior and in the lateral geniculate body than in the optic cortex. The level of GABA formation with pyridoxal-5-phosphate added in the corpora bigemina anterior and lateral geniculate body reaches its maximum on the 21st day of the postnatal development and in the optic cortex (field 17) at the age of three months. The highest amount of asparaginic asic with pyridoxal-5-phosphate added is formed in the optic cortex (field 17) by the 45th day of development and in the corpora bigemina anterior and geniculate body by the 90th day of life.